external/zlib-1.2.11/configure

   1 #!/bin/sh
   2 # configure script for zlib.
   3 #
   4 # Normally configure builds both a static and a shared library.
   5 # If you want to build just a static library, use: ./configure --static
   6 #
   7 # To impose specific compiler or flags or install directory, use for example:
   8 #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
   9 # or for csh/tcsh users:
  10 #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
  11
  12 # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
  13 # If you have problems, try without defining CC and CFLAGS before reporting
  14 # an error.
  15
  16 # start off configure.log
  17 echo -------------------- >> configure.log
  18 echo $0 $* >> configure.log
  19 date >> configure.log
  20
  21 # get source directory
  22 SRCDIR=`dirname $0`
  23 if test $SRCDIR = "."; then
  24     ZINC=""
  25     ZINCOUT="-I."
  26     SRCDIR=""
  27 else
  28     ZINC='-include zconf.h'
  29     ZINCOUT='-I. -I$(SRCDIR)'
  30     SRCDIR="$SRCDIR/"
  31 fi
  32
  33 # set command prefix for cross-compilation
  34 if [ -n "${CHOST}" ]; then
  35     uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
  36     CROSS_PREFIX="${CHOST}-"
  37 fi
  38
  39 # destination name for static library
  40 STATICLIB=libz.a
  41
  42 # extract zlib version numbers from zlib.h
  43 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}zlib.h`
  44 VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < ${SRCDIR}zlib.h`
  45 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < ${SRCDIR}zlib.h`
  46 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < ${SRCDIR}zlib.h`
  47
  48 # establish commands for library building
  49 if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  50     AR=${AR-"${CROSS_PREFIX}ar"}
  51     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
  52 else
  53     AR=${AR-"ar"}
  54     test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
  55 fi
  56 ARFLAGS=${ARFLAGS-"rc"}
  57 if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  58     RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
  59     test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
  60 else
  61     RANLIB=${RANLIB-"ranlib"}
  62 fi
  63 if "${CROSS_PREFIX}nm" --version >/dev/null 2>/dev/null || test $? -lt 126; then
  64     NM=${NM-"${CROSS_PREFIX}nm"}
  65     test -n "${CROSS_PREFIX}" && echo Using ${NM} | tee -a configure.log
  66 else
  67     NM=${NM-"nm"}
  68 fi
  69
  70 # set defaults before processing command line options
  71 LDCONFIG=${LDCONFIG-"ldconfig"}
  72 LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
  73 ARCHS=
  74 prefix=${prefix-/usr/local}
  75 exec_prefix=${exec_prefix-'${prefix}'}
  76 libdir=${libdir-'${exec_prefix}/lib'}
  77 sharedlibdir=${sharedlibdir-'${libdir}'}
  78 includedir=${includedir-'${prefix}/include'}
  79 mandir=${mandir-'${prefix}/share/man'}
  80 shared_ext='.so'
  81 shared=1
  82 solo=0
  83 cover=0
  84 zprefix=0
  85 zconst=0
  86 build64=0
  87 gcc=0
  88 warn=0
  89 debug=0
  90 old_cc="$CC"
  91 old_cflags="$CFLAGS"
  92 OBJC='$(OBJZ) $(OBJG)'
  93 PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)'
  94
  95 # leave this script, optionally in a bad way
  96 leave()
  97 {
  98   if test "$*" != "0"; then
  99     echo "** $0 aborting." | tee -a configure.log
 100   fi
 101   rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version
 102   echo -------------------- >> configure.log
 103   echo >> configure.log
 104   echo >> configure.log
 105   exit $1
 106 }
 107
 108 # process command line options
 109 while test $# -ge 1
 110 do
 111 case "$1" in
 112     -h* | --help)
 113       echo 'usage:' | tee -a configure.log
 114       echo '  configure [--const] [--zprefix] [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
 115       echo '    [--static] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
 116       echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
 117         exit 0 ;;
 118     -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
 119     -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
 120     -l*=* | --libdir=*) libdir=`echo $1 | sed 's/.*=//'`; shift ;;
 121     --sharedlibdir=*) sharedlibdir=`echo $1 | sed 's/.*=//'`; shift ;;
 122     -i*=* | --includedir=*) includedir=`echo $1 | sed 's/.*=//'`;shift ;;
 123     -u*=* | --uname=*) uname=`echo $1 | sed 's/.*=//'`;shift ;;
 124     -p* | --prefix) prefix="$2"; shift; shift ;;
 125     -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
 126     -l* | --libdir) libdir="$2"; shift; shift ;;
 127     -i* | --includedir) includedir="$2"; shift; shift ;;
 128     -s* | --shared | --enable-shared) shared=1; shift ;;
 129     -t | --static) shared=0; shift ;;
 130     --solo) solo=1; shift ;;
 131     --cover) cover=1; shift ;;
 132     -z* | --zprefix) zprefix=1; shift ;;
 133     -6* | --64) build64=1; shift ;;
 134     -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;;
 135     --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
 136     --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
 137     -c* | --const) zconst=1; shift ;;
 138     -w* | --warn) warn=1; shift ;;
 139     -d* | --debug) debug=1; shift ;;
 140     *)
 141       echo "unknown option: $1" | tee -a configure.log
 142       echo "$0 --help for help" | tee -a configure.log
 143       leave 1;;
 144     esac
 145 done
 146
 147 # temporary file name
 148 test=ztest$$
 149
 150 # put arguments in log, also put test file in log if used in arguments
 151 show()
 152 {
 153   case "$*" in
 154     *$test.c*)
 155       echo === $test.c === >> configure.log
 156       cat $test.c >> configure.log
 157       echo === >> configure.log;;
 158   esac
 159   echo $* >> configure.log
 160 }
 161
 162 # check for gcc vs. cc and set compile and link flags based on the system identified by uname
 163 cat > $test.c <<EOF
 164 extern int getchar();
 165 int hello() {return getchar();}
 166 EOF
 167
 168 test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
 169 cc=${CC-${CROSS_PREFIX}gcc}
 170 cflags=${CFLAGS-"-O3"}
 171 # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
 172 case "$cc" in
 173   *gcc*) gcc=1 ;;
 174   *clang*) gcc=1 ;;
 175 esac
 176 case `$cc -v 2>&1` in
 177   *gcc*) gcc=1 ;;
 178   *clang*) gcc=1 ;;
 179 esac
 180
 181 show $cc -c $test.c
 182 if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
 183   echo ... using gcc >> configure.log
 184   CC="$cc"
 185   CFLAGS="${CFLAGS--O3}"
 186   SFLAGS="${CFLAGS--O3} -fPIC"
 187   if test "$ARCHS"; then
 188     CFLAGS="${CFLAGS} ${ARCHS}"
 189     LDFLAGS="${LDFLAGS} ${ARCHS}"
 190   fi
 191   if test $build64 -eq 1; then
 192     CFLAGS="${CFLAGS} -m64"
 193     SFLAGS="${SFLAGS} -m64"
 194   fi
 195   if test "$warn" -eq 1; then
 196     if test "$zconst" -eq 1; then
 197       CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -pedantic -DZLIB_CONST"
 198     else
 199       CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
 200     fi
 201   fi
 202   if test $debug -eq 1; then
 203     CFLAGS="${CFLAGS} -DZLIB_DEBUG"
 204     SFLAGS="${SFLAGS} -DZLIB_DEBUG"
 205   fi
 206   if test -z "$uname"; then
 207     uname=`(uname -s || echo unknown) 2>/dev/null`
 208   fi
 209   case "$uname" in
 210   Linux* | linux* | GNU | GNU/* | solaris*)
 211         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"} ;;
 212   *BSD | *bsd* | DragonFly)
 213         LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"}
 214         LDCONFIG="ldconfig -m" ;;
 215   CYGWIN* | Cygwin* | cygwin* | OS/2*)
 216         EXE='.exe' ;;
 217   MINGW* | mingw*)
 218 # temporary bypass
 219         rm -f $test.[co] $test $test$shared_ext
 220         echo "Please use win32/Makefile.gcc instead." | tee -a configure.log
 221         leave 1
 222         LDSHARED=${LDSHARED-"$cc -shared"}
 223         LDSHAREDLIBC=""
 224         EXE='.exe' ;;
 225   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
 226          # (alain.bonnefoy@icbt.com)
 227                  LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"} ;;
 228   HP-UX*)
 229          LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
 230          case `(uname -m || echo unknown) 2>/dev/null` in
 231          ia64)
 232                  shared_ext='.so'
 233                  SHAREDLIB='libz.so' ;;
 234          *)
 235                  shared_ext='.sl'
 236                  SHAREDLIB='libz.sl' ;;
 237          esac ;;
 238   Darwin* | darwin*)
 239              shared_ext='.dylib'
 240              SHAREDLIB=libz$shared_ext
 241              SHAREDLIBV=libz.$VER$shared_ext
 242              SHAREDLIBM=libz.$VER1$shared_ext
 243              LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
 244              if libtool -V 2>&1 | grep Apple > /dev/null; then
 245                  AR="libtool"
 246              else
 247                  AR="/usr/bin/libtool"
 248              fi
 249              ARFLAGS="-o" ;;
 250   *)             LDSHARED=${LDSHARED-"$cc -shared"} ;;
 251   esac
 252 else
 253   # find system name and corresponding cc options
 254   CC=${CC-cc}
 255   gcc=0
 256   echo ... using $CC >> configure.log
 257   if test -z "$uname"; then
 258     uname=`(uname -sr || echo unknown) 2>/dev/null`
 259   fi
 260   case "$uname" in
 261   HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
 262              CFLAGS=${CFLAGS-"-O"}
 263 #            LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
 264              LDSHARED=${LDSHARED-"ld -b"}
 265          case `(uname -m || echo unknown) 2>/dev/null` in
 266          ia64)
 267              shared_ext='.so'
 268              SHAREDLIB='libz.so' ;;
 269          *)
 270              shared_ext='.sl'
 271              SHAREDLIB='libz.sl' ;;
 272          esac ;;
 273   IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
 274              CFLAGS=${CFLAGS-"-ansi -O2"}
 275              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
 276   OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
 277              CFLAGS=${CFLAGS-"-O -std1"}
 278              LDFLAGS="${LDFLAGS} -Wl,-rpath,."
 279              LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"} ;;
 280   OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
 281              CFLAGS=${CFLAGS-"-O -std1"}
 282              LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
 283   QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
 284              CFLAGS=${CFLAGS-"-4 -O"}
 285              LDSHARED=${LDSHARED-"cc"}
 286              RANLIB=${RANLIB-"true"}
 287              AR="cc"
 288              ARFLAGS="-A" ;;
 289   SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
 290              CFLAGS=${CFLAGS-"-O3"}
 291              LDSHARED=${LDSHARED-"cc -dy -KPIC -G"} ;;
 292   SunOS\ 5* | solaris*)
 293          LDSHARED=${LDSHARED-"cc -G -h libz$shared_ext.$VER1"}
 294          SFLAGS=${CFLAGS-"-fast -KPIC"}
 295          CFLAGS=${CFLAGS-"-fast"}
 296          if test $build64 -eq 1; then
 297              # old versions of SunPRO/Workshop/Studio don't support -m64,
 298              # but newer ones do.  Check for it.
 299              flag64=`$CC -flags | egrep -- '^-m64'`
 300              if test x"$flag64" != x"" ; then
 301                  CFLAGS="${CFLAGS} -m64"
 302                  SFLAGS="${SFLAGS} -m64"
 303              else
 304                  case `(uname -m || echo unknown) 2>/dev/null` in
 305                    i86*)
 306                      SFLAGS="$SFLAGS -xarch=amd64"
 307                      CFLAGS="$CFLAGS -xarch=amd64" ;;
 308                    *)
 309                      SFLAGS="$SFLAGS -xarch=v9"
 310                      CFLAGS="$CFLAGS -xarch=v9" ;;
 311                  esac
 312              fi
 313          fi
 314          if test -n "$ZINC"; then
 315              ZINC='-I- -I. -I$(SRCDIR)'
 316          fi
 317          ;;
 318   SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
 319              CFLAGS=${CFLAGS-"-O2"}
 320              LDSHARED=${LDSHARED-"ld"} ;;
 321   SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
 322              CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
 323              LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
 324   UNIX_System_V\ 4.2.0)
 325              SFLAGS=${CFLAGS-"-KPIC -O"}
 326              CFLAGS=${CFLAGS-"-O"}
 327              LDSHARED=${LDSHARED-"cc -G"} ;;
 328   UNIX_SV\ 4.2MP)
 329              SFLAGS=${CFLAGS-"-Kconform_pic -O"}
 330              CFLAGS=${CFLAGS-"-O"}
 331              LDSHARED=${LDSHARED-"cc -G"} ;;
 332   OpenUNIX\ 5)
 333              SFLAGS=${CFLAGS-"-KPIC -O"}
 334              CFLAGS=${CFLAGS-"-O"}
 335              LDSHARED=${LDSHARED-"cc -G"} ;;
 336   AIX*)  # Courtesy of dbakker@arrayasolutions.com
 337              SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
 338              CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
 339              LDSHARED=${LDSHARED-"xlc -G"} ;;
 340   # send working options for other systems to zlib@gzip.org
 341   *)         SFLAGS=${CFLAGS-"-O"}
 342              CFLAGS=${CFLAGS-"-O"}
 343              LDSHARED=${LDSHARED-"cc -shared"} ;;
 344   esac
 345 fi
 346
 347 # destination names for shared library if not defined above
 348 SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
 349 SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
 350 SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
 351
 352 echo >> configure.log
 353
 354 # define functions for testing compiler and library characteristics and logging the results
 355
 356 cat > $test.c <<EOF
 357 #error error
 358 EOF
 359 if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
 360   try()
 361   {
 362     show $*
 363     test "`( $* ) 2>&1 | tee -a configure.log`" = ""
 364   }
 365   echo - using any output from compiler to indicate an error >> configure.log
 366 else
 367   try()
 368   {
 369     show $*
 370     ( $* ) >> configure.log 2>&1
 371     ret=$?
 372     if test $ret -ne 0; then
 373       echo "(exit code "$ret")" >> configure.log
 374     fi
 375     return $ret
 376   }
 377 fi
 378
 379 tryboth()
 380 {
 381   show $*
 382   got=`( $* ) 2>&1`
 383   ret=$?
 384   printf %s "$got" >> configure.log
 385   if test $ret -ne 0; then
 386     return $ret
 387   fi
 388   test "$got" = ""
 389 }
 390
 391 cat > $test.c << EOF
 392 int foo() { return 0; }
 393 EOF
 394 echo "Checking for obsessive-compulsive compiler options..." >> configure.log
 395 if try $CC -c $CFLAGS $test.c; then
 396   :
 397 else
 398   echo "Compiler error reporting is too harsh for $0 (perhaps remove -Werror)." | tee -a configure.log
 399   leave 1
 400 fi
 401
 402 echo >> configure.log
 403
 404 # see if shared library build supported
 405 cat > $test.c <<EOF
 406 extern int getchar();
 407 int hello() {return getchar();}
 408 EOF
 409 if test $shared -eq 1; then
 410   echo Checking for shared library support... | tee -a configure.log
 411   # we must test in two steps (cc then ld), required at least on SunOS 4.x
 412   if try $CC -w -c $SFLAGS $test.c &&
 413      try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
 414     echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
 415   elif test -z "$old_cc" -a -z "$old_cflags"; then
 416     echo No shared library support. | tee -a configure.log
 417     shared=0;
 418   else
 419     echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
 420     shared=0;
 421   fi
 422 fi
 423 if test $shared -eq 0; then
 424   LDSHARED="$CC"
 425   ALL="static"
 426   TEST="all teststatic"
 427   SHAREDLIB=""
 428   SHAREDLIBV=""
 429   SHAREDLIBM=""
 430   echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
 431 else
 432   ALL="static shared"
 433   TEST="all teststatic testshared"
 434 fi
 435
 436 # check for underscores in external names for use by assembler code
 437 CPP=${CPP-"$CC -E"}
 438 case $CFLAGS in
 439   *ASMV*)
 440     echo >> configure.log
 441     show "$NM $test.o | grep _hello"
 442     if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
 443       CPP="$CPP -DNO_UNDERLINE"
 444       echo Checking for underline in external names... No. | tee -a configure.log
 445     else
 446       echo Checking for underline in external names... Yes. | tee -a configure.log
 447     fi ;;
 448 esac
 449
 450 echo >> configure.log
 451
 452 # check for size_t
 453 cat > $test.c <<EOF
 454 #include <stdio.h>
 455 #include <stdlib.h>
 456 size_t dummy = 0;
 457 EOF
 458 if try $CC -c $CFLAGS $test.c; then
 459   echo "Checking for size_t... Yes." | tee -a configure.log
 460   need_sizet=0
 461 else
 462   echo "Checking for size_t... No." | tee -a configure.log
 463   need_sizet=1
 464 fi
 465
 466 echo >> configure.log
 467
 468 # find the size_t integer type, if needed
 469 if test $need_sizet -eq 1; then
 470   cat > $test.c <<EOF
 471 long long dummy = 0;
 472 EOF
 473   if try $CC -c $CFLAGS $test.c; then
 474     echo "Checking for long long... Yes." | tee -a configure.log
 475     cat > $test.c <<EOF
 476 #include <stdio.h>
 477 int main(void) {
 478     if (sizeof(void *) <= sizeof(int)) puts("int");
 479     else if (sizeof(void *) <= sizeof(long)) puts("long");
 480     else puts("z_longlong");
 481     return 0;
 482 }
 483 EOF
 484   else
 485     echo "Checking for long long... No." | tee -a configure.log
 486     cat > $test.c <<EOF
 487 #include <stdio.h>
 488 int main(void) {
 489     if (sizeof(void *) <= sizeof(int)) puts("int");
 490     else puts("long");
 491     return 0;
 492 }
 493 EOF
 494   fi
 495   if try $CC $CFLAGS -o $test $test.c; then
 496     sizet=`./$test`
 497     echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
 498   else
 499     echo "Failed to find a pointer-size integer type." | tee -a configure.log
 500     leave 1
 501   fi
 502 fi
 503
 504 if test $need_sizet -eq 1; then
 505   CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
 506   SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
 507 fi
 508
 509 echo >> configure.log
 510
 511 # check for large file support, and if none, check for fseeko()
 512 cat > $test.c <<EOF
 513 #include <sys/types.h>
 514 off64_t dummy = 0;
 515 EOF
 516 if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
 517   CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
 518   SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
 519   ALL="${ALL} all64"
 520   TEST="${TEST} test64"
 521   echo "Checking for off64_t... Yes." | tee -a configure.log
 522   echo "Checking for fseeko... Yes." | tee -a configure.log
 523 else
 524   echo "Checking for off64_t... No." | tee -a configure.log
 525   echo >> configure.log
 526   cat > $test.c <<EOF
 527 #include <stdio.h>
 528 int main(void) {
 529   fseeko(NULL, 0, 0);
 530   return 0;
 531 }
 532 EOF
 533   if try $CC $CFLAGS -o $test $test.c; then
 534     echo "Checking for fseeko... Yes." | tee -a configure.log
 535   else
 536     CFLAGS="${CFLAGS} -DNO_FSEEKO"
 537     SFLAGS="${SFLAGS} -DNO_FSEEKO"
 538     echo "Checking for fseeko... No." | tee -a configure.log
 539   fi
 540 fi
 541
 542 echo >> configure.log
 543
 544 # check for strerror() for use by gz* functions
 545 cat > $test.c <<EOF
 546 #include <string.h>
 547 #include <errno.h>
 548 int main() { return strlen(strerror(errno)); }
 549 EOF
 550 if try $CC $CFLAGS -o $test $test.c; then
 551   echo "Checking for strerror... Yes." | tee -a configure.log
 552 else
 553   CFLAGS="${CFLAGS} -DNO_STRERROR"
 554   SFLAGS="${SFLAGS} -DNO_STRERROR"
 555   echo "Checking for strerror... No." | tee -a configure.log
 556 fi
 557
 558 # copy clean zconf.h for subsequent edits
 559 cp -p ${SRCDIR}zconf.h.in zconf.h
 560
 561 echo >> configure.log
 562
 563 # check for unistd.h and save result in zconf.h
 564 cat > $test.c <<EOF
 565 #include <unistd.h>
 566 int main() { return 0; }
 567 EOF
 568 if try $CC -c $CFLAGS $test.c; then
 569   sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
 570   mv zconf.temp.h zconf.h
 571   echo "Checking for unistd.h... Yes." | tee -a configure.log
 572 else
 573   echo "Checking for unistd.h... No." | tee -a configure.log
 574 fi
 575
 576 echo >> configure.log
 577
 578 # check for stdarg.h and save result in zconf.h
 579 cat > $test.c <<EOF
 580 #include <stdarg.h>
 581 int main() { return 0; }
 582 EOF
 583 if try $CC -c $CFLAGS $test.c; then
 584   sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
 585   mv zconf.temp.h zconf.h
 586   echo "Checking for stdarg.h... Yes." | tee -a configure.log
 587 else
 588   echo "Checking for stdarg.h... No." | tee -a configure.log
 589 fi
 590
 591 # if the z_ prefix was requested, save that in zconf.h
 592 if test $zprefix -eq 1; then
 593   sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
 594   mv zconf.temp.h zconf.h
 595   echo >> configure.log
 596   echo "Using z_ prefix on all symbols." | tee -a configure.log
 597 fi
 598
 599 # if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
 600 if test $solo -eq 1; then
 601   sed '/#define ZCONF_H/a\
 602 #define Z_SOLO
 603
 604 ' < zconf.h > zconf.temp.h
 605   mv zconf.temp.h zconf.h
 606 OBJC='$(OBJZ)'
 607 PIC_OBJC='$(PIC_OBJZ)'
 608 fi
 609
 610 # if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
 611 if test $cover -eq 1; then
 612   CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
 613   if test -n "$GCC_CLASSIC"; then
 614     CC=$GCC_CLASSIC
 615   fi
 616 fi
 617
 618 echo >> configure.log
 619
 620 # conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
 621 # (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
 622 # return value.  The most secure result is vsnprintf() with a return value.  snprintf() with a
 623 # return value is secure as well, but then gzprintf() will be limited to 20 arguments.
 624 cat > $test.c <<EOF
 625 #include <stdio.h>
 626 #include <stdarg.h>
 627 #include "zconf.h"
 628 int main()
 629 {
 630 #ifndef STDC
 631   choke me
 632 #endif
 633   return 0;
 634 }
 635 EOF
 636 if try $CC -c $CFLAGS $test.c; then
 637   echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
 638
 639   echo >> configure.log
 640   cat > $test.c <<EOF
 641 #include <stdio.h>
 642 #include <stdarg.h>
 643 int mytest(const char *fmt, ...)
 644 {
 645   char buf[20];
 646   va_list ap;
 647   va_start(ap, fmt);
 648   vsnprintf(buf, sizeof(buf), fmt, ap);
 649   va_end(ap);
 650   return 0;
 651 }
 652 int main()
 653 {
 654   return (mytest("Hello%d\n", 1));
 655 }
 656 EOF
 657   if try $CC $CFLAGS -o $test $test.c; then
 658     echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
 659
 660     echo >> configure.log
 661     cat >$test.c <<EOF
 662 #include <stdio.h>
 663 #include <stdarg.h>
 664 int mytest(const char *fmt, ...)
 665 {
 666   int n;
 667   char buf[20];
 668   va_list ap;
 669   va_start(ap, fmt);
 670   n = vsnprintf(buf, sizeof(buf), fmt, ap);
 671   va_end(ap);
 672   return n;
 673 }
 674 int main()
 675 {
 676   return (mytest("Hello%d\n", 1));
 677 }
 678 EOF
 679
 680     if try $CC -c $CFLAGS $test.c; then
 681       echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
 682     else
 683       CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
 684       SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
 685       echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
 686       echo "  WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
 687       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 688       echo "  vulnerabilities." | tee -a configure.log
 689     fi
 690   else
 691     CFLAGS="$CFLAGS -DNO_vsnprintf"
 692     SFLAGS="$SFLAGS -DNO_vsnprintf"
 693     echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
 694     echo "  WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
 695     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
 696     echo "  vulnerabilities." | tee -a configure.log
 697
 698     echo >> configure.log
 699     cat >$test.c <<EOF
 700 #include <stdio.h>
 701 #include <stdarg.h>
 702 int mytest(const char *fmt, ...)
 703 {
 704   int n;
 705   char buf[20];
 706   va_list ap;
 707   va_start(ap, fmt);
 708   n = vsprintf(buf, fmt, ap);
 709   va_end(ap);
 710   return n;
 711 }
 712 int main()
 713 {
 714   return (mytest("Hello%d\n", 1));
 715 }
 716 EOF
 717
 718     if try $CC -c $CFLAGS $test.c; then
 719       echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
 720     else
 721       CFLAGS="$CFLAGS -DHAS_vsprintf_void"
 722       SFLAGS="$SFLAGS -DHAS_vsprintf_void"
 723       echo "Checking for return value of vsprintf()... No." | tee -a configure.log
 724       echo "  WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
 725       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 726       echo "  vulnerabilities." | tee -a configure.log
 727     fi
 728   fi
 729 else
 730   echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
 731
 732   echo >> configure.log
 733   cat >$test.c <<EOF
 734 #include <stdio.h>
 735 int mytest()
 736 {
 737   char buf[20];
 738   snprintf(buf, sizeof(buf), "%s", "foo");
 739   return 0;
 740 }
 741 int main()
 742 {
 743   return (mytest());
 744 }
 745 EOF
 746
 747   if try $CC $CFLAGS -o $test $test.c; then
 748     echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
 749
 750     echo >> configure.log
 751     cat >$test.c <<EOF
 752 #include <stdio.h>
 753 int mytest()
 754 {
 755   char buf[20];
 756   return snprintf(buf, sizeof(buf), "%s", "foo");
 757 }
 758 int main()
 759 {
 760   return (mytest());
 761 }
 762 EOF
 763
 764     if try $CC -c $CFLAGS $test.c; then
 765       echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
 766     else
 767       CFLAGS="$CFLAGS -DHAS_snprintf_void"
 768       SFLAGS="$SFLAGS -DHAS_snprintf_void"
 769       echo "Checking for return value of snprintf()... No." | tee -a configure.log
 770       echo "  WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
 771       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 772       echo "  vulnerabilities." | tee -a configure.log
 773     fi
 774   else
 775     CFLAGS="$CFLAGS -DNO_snprintf"
 776     SFLAGS="$SFLAGS -DNO_snprintf"
 777     echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
 778     echo "  WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
 779     echo "  can build but will be open to possible buffer-overflow security" | tee -a configure.log
 780     echo "  vulnerabilities." | tee -a configure.log
 781
 782     echo >> configure.log
 783     cat >$test.c <<EOF
 784 #include <stdio.h>
 785 int mytest()
 786 {
 787   char buf[20];
 788   return sprintf(buf, "%s", "foo");
 789 }
 790 int main()
 791 {
 792   return (mytest());
 793 }
 794 EOF
 795
 796     if try $CC -c $CFLAGS $test.c; then
 797       echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
 798     else
 799       CFLAGS="$CFLAGS -DHAS_sprintf_void"
 800       SFLAGS="$SFLAGS -DHAS_sprintf_void"
 801       echo "Checking for return value of sprintf()... No." | tee -a configure.log
 802       echo "  WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
 803       echo "  can build but will be open to possible string-format security" | tee -a configure.log
 804       echo "  vulnerabilities." | tee -a configure.log
 805     fi
 806   fi
 807 fi
 808
 809 # see if we can hide zlib internal symbols that are linked between separate source files
 810 if test "$gcc" -eq 1; then
 811   echo >> configure.log
 812   cat > $test.c <<EOF
 813 #define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
 814 int ZLIB_INTERNAL foo;
 815 int main()
 816 {
 817   return 0;
 818 }
 819 EOF
 820   if tryboth $CC -c $CFLAGS $test.c; then
 821     CFLAGS="$CFLAGS -DHAVE_HIDDEN"
 822     SFLAGS="$SFLAGS -DHAVE_HIDDEN"
 823     echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
 824   else
 825     echo "Checking for attribute(visibility) support... No." | tee -a configure.log
 826   fi
 827 fi
 828
 829 # show the results in the log
 830 echo >> configure.log
 831 echo ALL = $ALL >> configure.log
 832 echo AR = $AR >> configure.log
 833 echo ARFLAGS = $ARFLAGS >> configure.log
 834 echo CC = $CC >> configure.log
 835 echo CFLAGS = $CFLAGS >> configure.log
 836 echo CPP = $CPP >> configure.log
 837 echo EXE = $EXE >> configure.log
 838 echo LDCONFIG = $LDCONFIG >> configure.log
 839 echo LDFLAGS = $LDFLAGS >> configure.log
 840 echo LDSHARED = $LDSHARED >> configure.log
 841 echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
 842 echo OBJC = $OBJC >> configure.log
 843 echo PIC_OBJC = $PIC_OBJC >> configure.log
 844 echo RANLIB = $RANLIB >> configure.log
 845 echo SFLAGS = $SFLAGS >> configure.log
 846 echo SHAREDLIB = $SHAREDLIB >> configure.log
 847 echo SHAREDLIBM = $SHAREDLIBM >> configure.log
 848 echo SHAREDLIBV = $SHAREDLIBV >> configure.log
 849 echo STATICLIB = $STATICLIB >> configure.log
 850 echo TEST = $TEST >> configure.log
 851 echo VER = $VER >> configure.log
 852 echo Z_U4 = $Z_U4 >> configure.log
 853 echo SRCDIR = $SRCDIR >> configure.log
 854 echo exec_prefix = $exec_prefix >> configure.log
 855 echo includedir = $includedir >> configure.log
 856 echo libdir = $libdir >> configure.log
 857 echo mandir = $mandir >> configure.log
 858 echo prefix = $prefix >> configure.log
 859 echo sharedlibdir = $sharedlibdir >> configure.log
 860 echo uname = $uname >> configure.log
 861
 862 # udpate Makefile with the configure results
 863 sed < ${SRCDIR}Makefile.in "
 864 /^CC *=/s#=.*#=$CC#
 865 /^CFLAGS *=/s#=.*#=$CFLAGS#
 866 /^SFLAGS *=/s#=.*#=$SFLAGS#
 867 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
 868 /^LDSHARED *=/s#=.*#=$LDSHARED#
 869 /^CPP *=/s#=.*#=$CPP#
 870 /^STATICLIB *=/s#=.*#=$STATICLIB#
 871 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 872 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 873 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
 874 /^AR *=/s#=.*#=$AR#
 875 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
 876 /^RANLIB *=/s#=.*#=$RANLIB#
 877 /^LDCONFIG *=/s#=.*#=$LDCONFIG#
 878 /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
 879 /^EXE *=/s#=.*#=$EXE#
 880 /^SRCDIR *=/s#=.*#=$SRCDIR#
 881 /^ZINC *=/s#=.*#=$ZINC#
 882 /^ZINCOUT *=/s#=.*#=$ZINCOUT#
 883 /^prefix *=/s#=.*#=$prefix#
 884 /^exec_prefix *=/s#=.*#=$exec_prefix#
 885 /^libdir *=/s#=.*#=$libdir#
 886 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
 887 /^includedir *=/s#=.*#=$includedir#
 888 /^mandir *=/s#=.*#=$mandir#
 889 /^OBJC *=/s#=.*#= $OBJC#
 890 /^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
 891 /^all: */s#:.*#: $ALL#
 892 /^test: */s#:.*#: $TEST#
 893 " > Makefile
 894
 895 # create zlib.pc with the configure results
 896 sed < ${SRCDIR}zlib.pc.in "
 897 /^CC *=/s#=.*#=$CC#
 898 /^CFLAGS *=/s#=.*#=$CFLAGS#
 899 /^CPP *=/s#=.*#=$CPP#
 900 /^LDSHARED *=/s#=.*#=$LDSHARED#
 901 /^STATICLIB *=/s#=.*#=$STATICLIB#
 902 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 903 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 904 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
 905 /^AR *=/s#=.*#=$AR#
 906 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
 907 /^RANLIB *=/s#=.*#=$RANLIB#
 908 /^EXE *=/s#=.*#=$EXE#
 909 /^prefix *=/s#=.*#=$prefix#
 910 /^exec_prefix *=/s#=.*#=$exec_prefix#
 911 /^libdir *=/s#=.*#=$libdir#
 912 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
 913 /^includedir *=/s#=.*#=$includedir#
 914 /^mandir *=/s#=.*#=$mandir#
 915 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
 916 " | sed -e "
 917 s/\@VERSION\@/$VER/g;
 918 " > zlib.pc
 919
 920 # done
 921 leave 0