configure

   1 #!/bin/sh
   2 # Based on the configure script from musl libc, MIT licensed
   3
   4 usage () {
   5 cat <<EOF
   6 Usage: $0 [OPTION]... [VAR=VALUE]...
   7
   8 To assign environment variables (e.g., CC, CFLAGS...), specify them as
   9 VAR=VALUE.  See below for descriptions of some of the useful variables.
  10
  11 Defaults for the options are specified in brackets.
  12
  13 Configuration:
  14   --srcdir=DIR            source directory [detected]
  15
  16 Installation directories:
  17   --prefix=PREFIX         main installation prefix [/usr/local]
  18   --exec-prefix=EPREFIX   installation prefix for executable files [PREFIX]
  19
  20 Fine tuning of the installation directories:
  21   --bindir=DIR            user executables [EPREFIX/bin]
  22   --sharedir=DIR          share directories [PREFIX/share]
  23   --docdir=DIR            misc. documentation [PREFIX/share/doc]
  24   --mandir=DIR            man pages [PREFIX/share/man]
  25
  26 Optional features:
  27   --enable-curses         build with Curses terminal output [yes]
  28   --enable-lua            build with Lua support [auto]
  29   --enable-lpeg-static    build with LPeg static linking [auto]
  30   --enable-tre            build with TRE regex support [auto]
  31   --enable-selinux        build with SELinux support [auto]
  32   --enable-acl            build with POSIX ACL support [auto]
  33   --enable-help           build with built-in help texts [yes]
  34
  35 Some influential environment variables:
  36   CC                      C compiler command [detected]
  37   CFLAGS                  C compiler flags [-Os -pipe ...]
  38   LDFLAGS                 Linker flags
  39
  40 Use these variables to override the choices made by configure.
  41
  42 EOF
  43 exit 0
  44 }
  45
  46 # Helper functions
  47
  48 quote () {
  49 tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
  50 $1
  51 EOF
  52 printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#"
  53 }
  54 echo () { printf "%s\n" "$*" ; }
  55 fail () { echo "$*" ; exit 1 ; }
  56 fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
  57 cmdexists () { type "$1" >/dev/null 2>&1 ; }
  58 trycc () { test -z "$CC" && cmdexists "$1" && CC=$1 ; }
  59
  60 stripdir () {
  61 while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done
  62 }
  63
  64 trycppif () {
  65 printf "checking preprocessor condition %s... " "$1"
  66 echo "typedef int x;" > "$tmpc"
  67 echo "#if $1" >> "$tmpc"
  68 echo "#error yes" >> "$tmpc"
  69 echo "#endif" >> "$tmpc"
  70 if $CC $2 -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
  71 printf "false\n"
  72 return 1
  73 else
  74 printf "true\n"
  75 return 0
  76 fi
  77 }
  78
  79 tryflag () {
  80 printf "checking whether compiler accepts %s... " "$2"
  81 echo "typedef int x;" > "$tmpc"
  82 if $CC $CFLAGS_TRY $2 -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
  83 printf "yes\n"
  84 eval "$1=\"\${$1} \$2\""
  85 eval "$1=\${$1# }"
  86 return 0
  87 else
  88 printf "no\n"
  89 return 1
  90 fi
  91 }
  92
  93 tryldflag () {
  94 printf "checking whether linker accepts %s... " "$2"
  95 echo "typedef int x;" > "$tmpc"
  96 if $CC $LDFLAGS_TRY -nostdlib -shared "$2" -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
  97 printf "yes\n"
  98 eval "$1=\"\${$1} \$2\""
  99 eval "$1=\${$1# }"
 100 return 0
 101 else
 102 printf "no\n"
 103 return 1
 104 fi
 105 }
 106
 107 # Beginning of actual script
 108
 109 CFLAGS_AUTO=
 110 CFLAGS_TRY=
 111 LDFLAGS_AUTO=
 112 LDFLAGS_TRY=
 113 SRCDIR=
 114 PREFIX=/usr/local
 115 EXEC_PREFIX='$(PREFIX)'
 116 BINDIR='$(EXEC_PREFIX)/bin'
 117 SHAREDIR='$(PREFIX)/share'
 118 DOCDIR='$(PREFIX)/share/doc'
 119 MANDIR='$(PREFIX)/share/man'
 120
 121 help=yes
 122 curses=yes
 123 lua=auto
 124 lpeg=auto
 125 tre=auto
 126 selinux=auto
 127 acl=auto
 128
 129 for arg ; do
 130 case "$arg" in
 131 --help|-h) usage ;;
 132 --srcdir=*) SRCDIR=${arg#*=} ;;
 133 --prefix=*) PREFIX=${arg#*=} ;;
 134 --exec-prefix=*) EXEC_PREFIX=${arg#*=} ;;
 135 --bindir=*) BINDIR=${arg#*=} ;;
 136 --sharedir=*) SHAREDIR=${arg#*=} ;;
 137 --docdir=*) DOCDIR=${arg#*=} ;;
 138 --mandir=*) MANDIR=${arg#*=} ;;
 139 --environment-only) environmentonly=yes ;;
 140 --enable-help|--enable-help=yes) help=yes ;;
 141 --disable-help|--enable-help=no) help=no ;;
 142 --enable-curses|--enable-curses=yes) curses=yes ;;
 143 --disable-curses|--enable-curses=no) curses=no ;;
 144 --enable-lua|--enable-lua=yes) lua=yes ;;
 145 --disable-lua|--enable-lua=no) lua=no ;;
 146 --enable-lpeg-static|--enable-lpeg-static=yes) lpeg=yes ;;
 147 --disable-lpeg-static|--enable-lpeg-static=no) lpeg=no ;;
 148 --enable-tre|--enable-tre=yes) tre=yes ;;
 149 --disable-tre|--enable-tre=no) tre=no ;;
 150 --enable-selinux|--enable-selinux=yes) selinux=yes ;;
 151 --disable-selinux|--enable-selinux=no) selinux=no ;;
 152 --enable-acl|--enable-acl=yes) acl=yes ;;
 153 --disable-acl|--enable-acl=no) acl=no ;;
 154 --enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
 155 -* ) echo "$0: unknown option $arg" ;;
 156 CC=*) CC=${arg#*=} ;;
 157 CFLAGS=*) CFLAGS=${arg#*=} ;;
 158 CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
 159 LDFLAGS=*) LDFLAGS=${arg#*=} ;;
 160 *=*) ;;
 161 *) ;;
 162 esac
 163 done
 164
 165 for i in SRCDIR PREFIX EXEC_PREFIX BINDIR SHAREDIR DOCDIR MANDIR ; do
 166 stripdir $i
 167 done
 168
 169 #
 170 # Get the source dir for out-of-tree builds
 171 #
 172 if test -z "$SRCDIR" ; then
 173 SRCDIR="${0%/configure}"
 174 stripdir SRCDIR
 175 fi
 176 abs_builddir="$(pwd)" || fail "$0: cannot determine working directory"
 177 abs_srcdir="$(cd $SRCDIR && pwd)" || fail "$0: invalid source directory $SRCDIR"
 178 test "$abs_srcdir" = "$abs_builddir" && SRCDIR=.
 179 test "$SRCDIR" != "." -a -f Makefile -a ! -h Makefile && fail "$0: Makefile already exists in the working directory"
 180
 181 #
 182 # Get a temp filename we can use
 183 #
 184 i=0
 185 set -C
 186 while : ; do i=$(($i+1))
 187 tmpc="./conf$$-$PPID-$i.c"
 188 tmpo="./conf$$-$PPID-$i.o"
 189 2>|/dev/null > "$tmpc" && break
 190 test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc"
 191 done
 192 set +C
 193 trap 'rm -f "$tmpc" "$tmpo"' EXIT QUIT TERM HUP
 194 trap 'rm -f "$tmpc" "$tmpo" && echo && fail "$0: interrupted"' INT
 195
 196 #
 197 # Find a C compiler to use
 198 #
 199 printf "checking for C compiler... "
 200 trycc cc
 201 trycc gcc
 202 trycc clang
 203 printf "%s\n" "$CC"
 204 test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
 205
 206 printf "checking whether C compiler works... "
 207 echo "typedef int x;" > "$tmpc"
 208 if output=$($CC $CPPFLAGS $CFLAGS -c -o "$tmpo" "$tmpc" 2>&1) ; then
 209 printf "yes\n"
 210 else
 211 printf "no; compiler output follows:\n%s\n" "$output"
 212 exit 1
 213 fi
 214
 215 #
 216 # Figure out options to force errors on unknown flags.
 217 #
 218 tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
 219 tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
 220 tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
 221 tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
 222
 223 CFLAGS_STD="-std=c99 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -DNDEBUG -D_FORTIFY_SOURCE=2"
 224 LDFLAGS_STD="-lc"
 225
 226 OS=$(uname)
 227
 228 case "$OS" in
 229 FreeBSD|DragonFly) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE -D__BSD_VISIBLE=1" ;;
 230 *BSD)    CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE" ;;
 231 Darwin)  CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
 232 AIX)     CFLAGS_STD="$CFLAGS_STD -D_ALL_SOURCE" ;;
 233 esac
 234
 235 tryflag CFLAGS -pipe
 236
 237 # Try flags to optimize binary size
 238 tryflag CFLAGS -Os
 239 tryflag CFLAGS -ffunction-sections
 240 tryflag CFLAGS -fdata-sections
 241 tryldflag LDFLAGS_AUTO -Wl,--gc-sections
 242
 243 # Try hardening flags
 244 tryflag CFLAGS -fPIE
 245 tryflag CFLAGS_AUTO -fstack-protector-all
 246 tryldflag LDFLAGS -Wl,-z,now
 247 tryldflag LDFLAGS -Wl,-z,relro
 248 tryldflag LDFLAGS_AUTO -pie
 249
 250 printf "creating config.mk... "
 251
 252 cmdline=$(quote "$0")
 253 for i ; do cmdline="$cmdline $(quote "$i")" ; done
 254
 255 exec 3>&1 1>config.mk
 256
 257 cat << EOF
 258 # This version of config.mk was generated by:
 259 # $cmdline
 260 # Any changes made here will be lost if configure is re-run
 261 SRCDIR = $SRCDIR
 262 PREFIX = $PREFIX
 263 EXEC_PREFIX = $EXEC_PREFIX
 264 BINDIR = $BINDIR
 265 DOCPREFIX = $DOCDIR
 266 MANPREFIX = $MANDIR
 267 SHAREPREFIX = $SHAREDIR
 268 CC = $CC
 269 CFLAGS = $CFLAGS
 270 LDFLAGS = $LDFLAGS
 271 CFLAGS_STD = $CFLAGS_STD
 272 LDFLAGS_STD = $LDFLAGS_STD
 273 CFLAGS_AUTO = $CFLAGS_AUTO
 274 LDFLAGS_AUTO = $LDFLAGS_AUTO
 275 CFLAGS_DEBUG = -U_FORTIFY_SOURCE -UNDEBUG -O0 -g3 -ggdb -Wall -Wextra -pedantic -Wno-missing-field-initializers -Wno-unused-parameter
 276 EOF
 277 exec 1>&3 3>&-
 278
 279 printf "done\n"
 280
 281 if test "$environmentonly" = "yes"; then
 282         exit 0
 283 fi
 284
 285 have_pkgconfig=no
 286 printf "checking for pkg-config... "
 287 cmdexists pkg-config && have_pkgconfig=yes
 288 printf "%s\n" "$have_pkgconfig"
 289
 290 if test "$help" = "yes" ; then
 291         CONFIG_HELP=1
 292 else
 293         CONFIG_HELP=0
 294 fi
 295
 296 CONFIG_CURSES=0
 297
 298 if test "$curses" != "no" ; then
 299
 300         printf "checking for libcurses...\n"
 301
 302 cat > "$tmpc" <<EOF
 303 #include <curses.h>
 304
 305 int main(int argc, char *argv[]) {
 306         initscr();
 307         endwin();
 308         return 0;
 309 }
 310 EOF
 311
 312         for libcurses in ncursesw ncurses libcurses; do
 313                 printf " checking for %s... " "$libcurses"
 314
 315                 if test "$have_pkgconfig" = "yes" ; then
 316                         CFLAGS_CURSES=$(pkg-config --cflags $libcurses 2>/dev/null)
 317                         LDFLAGS_CURSES=$(pkg-config --libs $libcurses 2>/dev/null)
 318                         if test $? -eq 0 && $CC $CFLAGS $CFLAGS_CURSES "$tmpc" \
 319                                 $LDFLAGS $LDFLAGS_CURSES -o "$tmpo" >/dev/null 2>&1 ; then
 320                                 CONFIG_CURSES=1
 321                                 printf "yes\n"
 322                                 break
 323                         fi
 324                 fi
 325
 326                 CFLAGS_CURSES=""
 327                 LDFLAGS_CURSES="-l$libcurses"
 328
 329                 if $CC $CFLAGS $CFLAGS_CURSES "$tmpc" \
 330                         $LDFLAGS $LDFLAGS_CURSES -o "$tmpo" >/dev/null 2>&1 ; then
 331                         CONFIG_CURSES=1
 332                         printf "yes\n"
 333                         break
 334                 else
 335                         CFLAGS_CURSES=""
 336                         LDFLAGS_CURSES=""
 337                         printf "no\n"
 338                 fi
 339         done
 340
 341         test "$curses" = "yes" -a $CONFIG_CURSES -ne 1 && fail "$0: cannot find libcurses"
 342 fi
 343
 344 # libtermkey is a mandatory dependency
 345
 346 printf "checking for libtermkey... "
 347 cat > "$tmpc" <<EOF
 348 #include <termkey.h>
 349
 350 int main(int argc, char *argv[]) {
 351         TERMKEY_CHECK_VERSION;
 352         return 0;
 353 }
 354 EOF
 355
 356 if test "$have_pkgconfig" = "yes" ; then
 357         CFLAGS_TERMKEY=$(pkg-config --cflags termkey 2>/dev/null)
 358         LDFLAGS_TERMKEY=$(pkg-config --libs termkey 2>/dev/null)
 359 fi
 360
 361 if test -z "$LDFLAGS_TERMKEY"; then
 362         CFLAGS_TERMKEY=""
 363         LDFLAGS_TERMKEY="-ltermkey"
 364 fi
 365
 366 if $CC $CFLAGS $CFLAGS_TERMKEY "$tmpc" $LDFLAGS $LDFLAGS_TERMKEY $LDFLAGS_CURSES \
 367         -o "$tmpo" >/dev/null 2>&1; then
 368         printf "%s\n" "yes"
 369 else
 370         printf "%s\n" "no"
 371         fail "$0: cannot find libtermkey"
 372 fi
 373
 374 CONFIG_TRE=0
 375 REGEX_SRC=text-regex.c
 376
 377 if test "$tre" != "no" ; then
 378
 379         printf "checking for libtre... "
 380
 381 cat > "$tmpc" <<EOF
 382 #include <tre/tre.h>
 383
 384 int main() {
 385         regex_t preg;
 386         tre_str_source *source = NULL;
 387         regmatch_t pmatch[1];
 388         tre_regcomp(&preg, "\0", REG_EXTENDED);
 389         tre_reguexec(&preg, source, 1, pmatch, 0);
 390         tre_regfree(&preg);
 391         return 0;
 392 }
 393 EOF
 394
 395         if test "$have_pkgconfig" = "yes" ; then
 396                 CFLAGS_TRE=$(pkg-config --cflags tre 2>/dev/null)
 397                 LDFLAGS_TRE=$(pkg-config --libs tre 2>/dev/null)
 398         fi
 399
 400         if test -z "$LDFLAGS_TRE"; then
 401                 CFLAGS_TRE=""
 402                 LDFLAGS_TRE="-ltre"
 403         fi
 404
 405         if $CC $CFLAGS $CFLAGS_TRE "$tmpc" \
 406                 $LDFLAGS $LDFLAGS_TRE -o "$tmpo" >/dev/null 2>&1; then
 407                 CONFIG_TRE=1
 408                 REGEX_SRC=text-regex-tre.c
 409                 printf "%s\n" "yes"
 410         else
 411                 printf "%s\n" "no"
 412                 CFLAGS_TRE=""
 413                 LDFLAGS_TRE=""
 414                 test "$tre" = "yes" && fail "$0: cannot find libtre"
 415         fi
 416 fi
 417
 418 CONFIG_LUA=0
 419
 420 # enabling builtin lpeg requires lua support
 421 test "$lpeg" = "yes" -a "$lua" = "no" && fail "$0: need lua support for built-in lpeg"
 422 test "$lpeg" = "yes" && lua=yes
 423
 424 if test "$lua" != "no" ; then
 425
 426         printf "checking for liblua >= 5.2 ...\n"
 427
 428 cat > "$tmpc" <<EOF
 429 #include <lua.h>
 430 #include <lualib.h>
 431 #include <lauxlib.h>
 432
 433 #if LUA_VERSION_NUM < 502
 434 #error "Need at least Lua 5.2"
 435 #endif
 436
 437 int main(int argc, char *argv[]) {
 438         lua_State *L = luaL_newstate();
 439         luaL_openlibs(L);
 440         lua_close(L);
 441         return 0;
 442 }
 443 EOF
 444
 445         for liblua in lua lua5.3 lua5.2 lua-5.3 lua-5.2 lua53 lua52; do
 446                 printf " checking for %s... " "$liblua"
 447
 448                 if test "$have_pkgconfig" = "yes" ; then
 449                         CFLAGS_LUA=$(pkg-config --cflags $liblua 2>/dev/null)
 450                         LDFLAGS_LUA=$(pkg-config --libs $liblua 2>/dev/null)
 451                         if test $? -eq 0 && $CC $CFLAGS $CFLAGS_LUA "$tmpc" \
 452                                 $LDFLAGS $LDFLAGS_LUA -o "$tmpo" >/dev/null 2>&1 ; then
 453                                 CONFIG_LUA=1
 454                                 printf "yes\n"
 455                                 break
 456                         fi
 457                 fi
 458
 459                 CFLAGS_LUA=""
 460                 LDFLAGS_LUA="-l$liblua -lm -ldl"
 461
 462                 if $CC $CFLAGS $CFLAGS_LUA "$tmpc" \
 463                         $LDFLAGS $LDFLAGS_LUA -o "$tmpo" >/dev/null 2>&1 ; then
 464                         CONFIG_LUA=1
 465                         printf "yes\n"
 466                         break
 467                 else
 468                         printf "no\n"
 469                         CFLAGS_LUA=""
 470                         LDFLAGS_LUA=""
 471                 fi
 472         done
 473
 474         test "$lua" = "yes" -a $CONFIG_LUA -ne 1 && fail "$0: cannot find liblua"
 475
 476         if test $CONFIG_LUA -eq 1; then
 477                 CFLAGS_LUA="$CFLAGS_LUA -DLUA_COMPAT_5_1 -DLUA_COMPAT_5_2 -DLUA_COMPAT_ALL"
 478         fi
 479 fi
 480
 481 CONFIG_LPEG=0
 482
 483 if test $CONFIG_LUA -eq 1 -a "$lpeg" != "no" ; then
 484
 485         printf "checking for Lua statically linked liblpeg...\n"
 486
 487 cat > "$tmpc" <<EOF
 488 #include <lua.h>
 489 #include <lualib.h>
 490 #include <lauxlib.h>
 491
 492 int main(int argc, char *argv[]) {
 493         lua_State *L = luaL_newstate();
 494         luaL_openlibs(L);
 495         extern int luaopen_lpeg(lua_State *L);
 496         lua_getglobal(L, "package");
 497         lua_getfield(L, -1, "preload");
 498         lua_pushcfunction(L, luaopen_lpeg);
 499         lua_setfield(L, -2, "lpeg");
 500         lua_pop(L, 2);
 501         lua_close(L);
 502         return 0;
 503 }
 504 EOF
 505
 506         for liblpeg in lpeg lua5.3-lpeg lua5.2-lpeg; do
 507                 printf " checking for static %s... " "$liblpeg"
 508
 509                 if test "$have_pkgconfig" = "yes" ; then
 510                         CFLAGS_LPEG=$(pkg-config --cflags $liblpeg 2>/dev/null)
 511                         LDFLAGS_LPEG=$(pkg-config --libs $liblpeg 2>/dev/null)
 512                         if test $? -eq 0 && $CC $CFLAGS $CFLAGS_LUA $CFLAGS_LPEG "$tmpc" \
 513                                 $LDFLAGS $LDFLAGS_LUA $LDFLAGS_LPEG -o "$tmpo" >/dev/null 2>&1 ; then
 514                                 CONFIG_LPEG=1
 515                                 printf "yes\n"
 516                                 break
 517                         fi
 518                 fi
 519
 520                 CFLAGS_LPEG=""
 521                 LDFLAGS_LPEG="-l$liblpeg"
 522
 523                 if $CC $CFLAGS $CFLAGS_LUA $CFLAGS_LPEG "$tmpc" \
 524                         $LDFLAGS $LDFLAGS_LUA $LDFLAGS_LPEG -o "$tmpo" >/dev/null 2>&1 ; then
 525                         CONFIG_LPEG=1
 526                         printf "yes\n"
 527                         break
 528                 else
 529                         printf "no\n"
 530                         CFLAGS_LPEG=""
 531                         LDFLAGS_LPEG=""
 532                 fi
 533         done
 534
 535         test "$lpeg" = "yes" -a $CONFIG_LPEG -ne 1 && fail "$0: cannot find liblpeg"
 536 fi
 537
 538 CONFIG_ACL=0
 539
 540 if test "$OS" = "Linux" -a "$acl" != "no"; then
 541         printf "checking for libacl... "
 542
 543 cat > "$tmpc" <<EOF
 544 #include <sys/types.h>
 545 #include <sys/acl.h>
 546
 547 int main(int argc, char *argv[]) {
 548         acl_t acl = acl_get_fd(0);
 549         return 0;
 550 }
 551 EOF
 552
 553         if test "$have_pkgconfig" = "yes" ; then
 554                 CFLAGS_ACL=$(pkg-config --cflags acl 2>/dev/null)
 555                 LDFLAGS_ACL=$(pkg-config --libs acl 2>/dev/null)
 556         fi
 557
 558         if test -z "$LDFLAGS_ACL"; then
 559                 CFLAGS_ACL=""
 560                 LDFLAGS_ACL="-lacl"
 561         fi
 562
 563         if $CC $CFLAGS $CFLAGS_ACL "$tmpc" \
 564                 $LDFLAGS $LDFLAGS_ACL -o "$tmpo" >/dev/null 2>&1; then
 565                 CONFIG_ACL=1
 566                 printf "%s\n" "yes"
 567         else
 568                 printf "%s\n" "no"
 569                 CFLAGS_ACL=""
 570                 LDFLAGS_ACL=""
 571                 test "$acl" = "yes" && fail "$0: cannot find libacl"
 572         fi
 573 fi
 574
 575 CONFIG_SELINUX=0
 576
 577 if test "$OS" = "Linux" -a "$selinux" != "no"; then
 578         printf "checking for libselinux... "
 579
 580 cat > "$tmpc" <<EOF
 581 #include <selinux/selinux.h>
 582
 583 int main(int argc, char *argv[]) {
 584         return is_selinux_enabled();
 585 }
 586 EOF
 587
 588         if test "$have_pkgconfig" = "yes" ; then
 589                 CFLAGS_SELINUX=$(pkg-config --cflags selinux 2>/dev/null)
 590                 LDFLAGS_SELINUX=$(pkg-config --libs selinux 2>/dev/null)
 591         fi
 592
 593         if test -z "$LDFLAGS_SELINUX"; then
 594                 CFLAGS_SELINUX=""
 595                 LDFLAGS_SELINUX="-lselinux"
 596         fi
 597
 598         if $CC $CFLAGS $CFLAGS_SELINUX "$tmpc" \
 599                 $LDFLAGS $LDFLAGS_SELINUX -o "$tmpo" >/dev/null 2>&1; then
 600                 CONFIG_SELINUX=1
 601                 printf "%s\n" "yes"
 602         else
 603                 printf "%s\n" "no"
 604                 CFLAGS_SELINUX=""
 605                 LDFLAGS_SELINUX=""
 606                 test "$selinux" = "yes" && fail "$0: cannot find libselinux"
 607         fi
 608 fi
 609
 610 printf "checking for memrchr... "
 611
 612 cat > "$tmpc" <<EOF
 613 #define _GNU_SOURCE
 614 #include <string.h>
 615
 616 int main(int argc, char *argv[]) {
 617         return !memrchr("\n", '\n', 1);
 618 }
 619 EOF
 620
 621 if $CC $CFLAGS "$tmpc" $LDFLAGS -o "$tmpo" >/dev/null 2>&1; then
 622         HAVE_MEMRCHR=1
 623         printf "%s\n" "yes"
 624 else
 625         HAVE_MEMRCHR=0
 626         printf "%s\n" "no"
 627 fi
 628
 629 printf "completing config.mk... "
 630
 631 exec 3>&1 1>>config.mk
 632
 633 cat << EOF
 634 CONFIG_HELP = $CONFIG_HELP
 635 CFLAGS_TERMKEY = $CFLAGS_TERMKEY
 636 LDFLAGS_TERMKEY = $LDFLAGS_TERMKEY
 637 CONFIG_CURSES = $CONFIG_CURSES
 638 CFLAGS_CURSES = $CFLAGS_CURSES
 639 LDFLAGS_CURSES = $LDFLAGS_CURSES
 640 REGEX_SRC = $REGEX_SRC
 641 CONFIG_TRE = $CONFIG_TRE
 642 CFLAGS_TRE = $CFLAGS_TRE
 643 LDFLAGS_TRE = $LDFLAGS_TRE
 644 CONFIG_LUA = $CONFIG_LUA
 645 CFLAGS_LUA = $CFLAGS_LUA
 646 LDFLAGS_LUA = $LDFLAGS_LUA
 647 CONFIG_LPEG = $CONFIG_LPEG
 648 CFLAGS_LPEG = $CFLAGS_LPEG
 649 LDFLAGS_LPEG = $LDFLAGS_LPEG
 650 CONFIG_ACL = $CONFIG_ACL
 651 CFLAGS_ACL = $CFLAGS_ACL
 652 LDFLAGS_ACL = $LDFLAGS_ACL
 653 CONFIG_SELINUX = $CONFIG_SELINUX
 654 CFLAGS_SELINUX = $CFLAGS_SELINUX
 655 LDFLAGS_SELINUX = $LDFLAGS_SELINUX
 656 CFLAGS_LIBC = -DHAVE_MEMRCHR=$HAVE_MEMRCHR
 657 EOF
 658 exec 1>&3 3>&-
 659
 660 test "$SRCDIR" = "." || ln -sf $SRCDIR/Makefile .
 661
 662 printf "done\n"