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 support for statically linked LPeg [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" "$tmpo"' EXIT INT QUIT TERM HUP
 194
 195 #
 196 # Find a C compiler to use
 197 #
 198 printf "checking for C compiler... "
 199 trycc cc
 200 trycc gcc
 201 trycc clang
 202 printf "%s\n" "$CC"
 203 test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
 204
 205 printf "checking whether C compiler works... "
 206 echo "typedef int x;" > "$tmpc"
 207 if output=$($CC $CPPFLAGS $CFLAGS -c -o "$tmpo" "$tmpc" 2>&1) ; then
 208 printf "yes\n"
 209 else
 210 printf "no; compiler output follows:\n%s\n" "$output"
 211 exit 1
 212 fi
 213
 214 #
 215 # Figure out options to force errors on unknown flags.
 216 #
 217 tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
 218 tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
 219 tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
 220 tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
 221
 222 CFLAGS_STD="-std=c99 -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -DNDEBUG -D_FORTIFY_SOURCE=2"
 223 LDFLAGS_STD="-lc"
 224
 225 OS=$(uname)
 226
 227 case "$OS" in
 228 FreeBSD) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE -D__BSD_VISIBLE=1" ;;
 229 *BSD)    CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE" ;;
 230 Darwin)  CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
 231 AIX)     CFLAGS_STD="$CFLAGS_STD -D_ALL_SOURCE" ;;
 232 esac
 233
 234 tryflag CFLAGS -pipe
 235
 236 # Try flags to optimize binary size
 237 tryflag CFLAGS -Os
 238 tryflag CFLAGS -ffunction-sections
 239 tryflag CFLAGS -fdata-sections
 240 tryldflag LDFLAGS_AUTO -Wl,--gc-sections
 241
 242 # Try hardening flags
 243 tryflag CFLAGS -fPIE
 244 tryflag CFLAGS_AUTO -fstack-protector-all
 245 tryldflag LDFLAGS -Wl,-z,now
 246 tryldflag LDFLAGS -Wl,-z,relro
 247 tryldflag LDFLAGS_AUTO -pie
 248
 249 printf "creating config.mk... "
 250
 251 cmdline=$(quote "$0")
 252 for i ; do cmdline="$cmdline $(quote "$i")" ; done
 253
 254 exec 3>&1 1>config.mk
 255
 256 cat << EOF
 257 # This version of config.mk was generated by:
 258 # $cmdline
 259 # Any changes made here will be lost if configure is re-run
 260 SRCDIR = $SRCDIR
 261 PREFIX = $PREFIX
 262 EXEC_PREFIX = $EXEC_PREFIX
 263 BINDIR = $BINDIR
 264 DOCPREFIX = $DOCDIR
 265 MANPREFIX = $MANDIR
 266 SHAREPREFIX = $SHAREDIR
 267 CC = $CC
 268 CFLAGS = $CFLAGS
 269 LDFLAGS = $LDFLAGS
 270 CFLAGS_STD = $CFLAGS_STD
 271 LDFLAGS_STD = $LDFLAGS_STD
 272 CFLAGS_AUTO = $CFLAGS_AUTO
 273 LDFLAGS_AUTO = $LDFLAGS_AUTO
 274 CFLAGS_DEBUG = -U_FORTIFY_SOURCE -UNDEBUG -O0 -g -ggdb -Wall -Wextra -pedantic -Wno-missing-field-initializers -Wno-unused-parameter
 275 EOF
 276 exec 1>&3 3>&-
 277
 278 printf "done\n"
 279
 280 if test "$environmentonly" = "yes"; then
 281         exit 0
 282 fi
 283
 284 have_pkgconfig=no
 285 printf "checking for pkg-config... "
 286 cmdexists pkg-config && have_pkgconfig=yes
 287 printf "%s\n" "$have_pkgconfig"
 288
 289 if test "$help" = "yes" ; then
 290         CONFIG_HELP=1
 291 else
 292         CONFIG_HELP=0
 293 fi
 294
 295 CONFIG_CURSES=0
 296
 297 if test "$curses" != "no" ; then
 298
 299         printf "checking for libcurses...\n"
 300
 301 cat > "$tmpc" <<EOF
 302 #include <curses.h>
 303
 304 int main(int argc, char *argv[]) {
 305         initscr();
 306         endwin();
 307         return 0;
 308 }
 309 EOF
 310
 311         for libcurses in ncursesw ncurses libcurses; do
 312                 printf " checking for %s... " "$libcurses"
 313
 314                 if test "$have_pkgconfig" = "yes" ; then
 315                         CFLAGS_CURSES=$(pkg-config --cflags $libcurses 2>/dev/null)
 316                         LDFLAGS_CURSES=$(pkg-config --libs $libcurses 2>/dev/null)
 317                         if test $? -eq 0 && $CC $CFLAGS $CFLAGS_CURSES "$tmpc" \
 318                                 $LDFLAGS $LDFLAGS_CURSES -o "$tmpo" >/dev/null 2>&1 ; then
 319                                 CONFIG_CURSES=1
 320                                 printf "yes\n"
 321                                 break
 322                         fi
 323                 fi
 324
 325                 CFLAGS_CURSES=""
 326                 LDFLAGS_CURSES="-l$libcurses"
 327
 328                 if $CC $CFLAGS $CFLAGS_CURSES "$tmpc" \
 329                         $LDFLAGS $LDFLAGS_CURSES -o "$tmpo" >/dev/null 2>&1 ; then
 330                         CONFIG_CURSES=1
 331                         printf "yes\n"
 332                         break
 333                 else
 334                         CFLAGS_CURSES=""
 335                         LDFLAGS_CURSES=""
 336                         printf "no\n"
 337                 fi
 338         done
 339
 340         test "$curses" = "yes" -a $CONFIG_CURSES -ne 1 && fail "$0: cannot find libcurses"
 341 fi
 342
 343 # libtermkey is a mandatory dependency
 344
 345 printf "checking for libtermkey... "
 346 cat > "$tmpc" <<EOF
 347 #include <termkey.h>
 348
 349 int main(int argc, char *argv[]) {
 350         TERMKEY_CHECK_VERSION;
 351         return 0;
 352 }
 353 EOF
 354
 355 if test "$have_pkgconfig" = "yes" ; then
 356         CFLAGS_TERMKEY=$(pkg-config --cflags termkey 2>/dev/null)
 357         LDFLAGS_TERMKEY=$(pkg-config --libs termkey 2>/dev/null)
 358 fi
 359
 360 if test -z "$LDFLAGS_TERMKEY"; then
 361         CFLAGS_TERMKEY=""
 362         LDFLAGS_TERMKEY="-ltermkey -lncursesw"
 363 fi
 364
 365 if $CC $CFLAGS $CFLAGS_TERMKEY "$tmpc" $LDFLAGS $LDFLAGS_TERMKEY $LDFLAGS_CURSES \
 366         -o "$tmpo" >/dev/null 2>&1; then
 367         printf "%s\n" "yes"
 368 else
 369         printf "%s\n" "no"
 370         fail "$0: cannot find libtermkey"
 371 fi
 372
 373 CONFIG_TRE=0
 374 REGEX_SRC=text-regex.c
 375
 376 if test "$tre" != "no" ; then
 377
 378         printf "checking for libtre... "
 379
 380 cat > "$tmpc" <<EOF
 381 #include <tre/tre.h>
 382
 383 int main() {
 384         regex_t preg;
 385         tre_str_source *source = NULL;
 386         regmatch_t pmatch[1];
 387         tre_regcomp(&preg, "\0", REG_EXTENDED);
 388         tre_reguexec(&preg, source, 1, pmatch, 0);
 389         tre_regfree(&preg);
 390         return 0;
 391 }
 392 EOF
 393
 394         if test "$have_pkgconfig" = "yes" ; then
 395                 CFLAGS_TRE=$(pkg-config --cflags tre 2>/dev/null)
 396                 LDFLAGS_TRE=$(pkg-config --libs tre 2>/dev/null)
 397         fi
 398
 399         if test -z "$LDFLAGS_TRE"; then
 400                 CFLAGS_TRE=""
 401                 LDFLAGS_TRE="-ltre"
 402         fi
 403
 404         if $CC $CFLAGS $CFLAGS_TRE "$tmpc" \
 405                 $LDFLAGS $LDFLAGS_TRE -o "$tmpo" >/dev/null 2>&1; then
 406                 CONFIG_TRE=1
 407                 REGEX_SRC=text-regex-tre.c
 408                 printf "%s\n" "yes"
 409         else
 410                 printf "%s\n" "no"
 411                 CFLAGS_TRE=""
 412                 LDFLAGS_TRE=""
 413                 test "$tre" = "yes" && fail "$0: cannot find libtre"
 414         fi
 415 fi
 416
 417 CONFIG_LUA=0
 418
 419 # enabling builtin lpeg requires lua support
 420 test "$lpeg" = "yes" -a "$lua" = "no" && fail "$0: need lua support for built-in lpeg"
 421 test "$lpeg" = "yes" && lua=yes
 422
 423 if test "$lua" != "no" ; then
 424
 425         printf "checking for liblua >= 5.2 ...\n"
 426
 427 cat > "$tmpc" <<EOF
 428 #include <lua.h>
 429 #include <lualib.h>
 430 #include <lauxlib.h>
 431
 432 #if LUA_VERSION_NUM < 502
 433 #error "Need at least Lua 5.2"
 434 #endif
 435
 436 int main(int argc, char *argv[]) {
 437         lua_State *L = luaL_newstate();
 438         luaL_openlibs(L);
 439         lua_close(L);
 440         return 0;
 441 }
 442 EOF
 443
 444         for liblua in lua lua5.3 lua5.2 lua-5.3 lua-5.2 lua53 lua52; do
 445                 printf " checking for %s... " "$liblua"
 446
 447                 if test "$have_pkgconfig" = "yes" ; then
 448                         CFLAGS_LUA=$(pkg-config --cflags $liblua 2>/dev/null)
 449                         LDFLAGS_LUA=$(pkg-config --libs $liblua 2>/dev/null)
 450                         if test $? -eq 0 && $CC $CFLAGS $CFLAGS_LUA "$tmpc" \
 451                                 $LDFLAGS $LDFLAGS_LUA -o "$tmpo" >/dev/null 2>&1 ; then
 452                                 CONFIG_LUA=1
 453                                 printf "yes\n"
 454                                 break
 455                         fi
 456                 fi
 457
 458                 CFLAGS_LUA=""
 459                 LDFLAGS_LUA="-l$liblua -lm -ldl"
 460
 461                 if $CC $CFLAGS $CFLAGS_LUA "$tmpc" \
 462                         $LDFLAGS $LDFLAGS_LUA -o "$tmpo" >/dev/null 2>&1 ; then
 463                         CONFIG_LUA=1
 464                         printf "yes\n"
 465                         break
 466                 else
 467                         printf "no\n"
 468                         CFLAGS_LUA=""
 469                         LDFLAGS_LUA=""
 470                 fi
 471         done
 472
 473         test "$lua" = "yes" -a $CONFIG_LUA -ne 1 && fail "$0: cannot find liblua"
 474
 475         if test $CONFIG_LUA -eq 1; then
 476                 CFLAGS_LUA="$CFLAGS_LUA -DLUA_COMPAT_5_1 -DLUA_COMPAT_5_2 -DLUA_COMPAT_ALL"
 477         fi
 478 fi
 479
 480 CONFIG_LPEG=0
 481
 482 if test $CONFIG_LUA -eq 1 -a "$lpeg" != "no" ; then
 483
 484         printf "checking for statically linked liblpeg ... "
 485
 486 cat > "$tmpc" <<EOF
 487 #include <lua.h>
 488 #include <lualib.h>
 489 #include <lauxlib.h>
 490
 491 int main(int argc, char *argv[]) {
 492         lua_State *L = luaL_newstate();
 493         luaL_openlibs(L);
 494         extern int luaopen_lpeg(lua_State *L);
 495         lua_getglobal(L, "package");
 496         lua_getfield(L, -1, "preload");
 497         lua_pushcfunction(L, luaopen_lpeg);
 498         lua_setfield(L, -2, "lpeg");
 499         lua_pop(L, 2);
 500         lua_close(L);
 501         return 0;
 502 }
 503 EOF
 504
 505         CFLAGS_LPEG=""
 506         LDFLAGS_LPEG="-llpeg"
 507
 508         if $CC $CFLAGS $CFLAGS_LUA $CFLAGS_LPEG "$tmpc" \
 509                 $LDFLAGS $LDFLAGS_LUA $LDFLAGS_LPEG -o "$tmpo" >/dev/null 2>&1 ; then
 510                 CONFIG_LPEG=1
 511                 printf "yes\n"
 512                 break
 513         else
 514                 printf "no\n"
 515                 CFLAGS_LPEG=""
 516                 LDFLAGS_LPEG=""
 517         fi
 518
 519         test "$lpeg" = "yes" -a $CONFIG_LPEG -ne 1 && fail "$0: cannot find liblpeg"
 520 fi
 521
 522 CONFIG_ACL=0
 523
 524 if test "$OS" = "Linux" -a "$acl" != "no"; then
 525         printf "checking for libacl... "
 526
 527 cat > "$tmpc" <<EOF
 528 #include <sys/types.h>
 529 #include <sys/acl.h>
 530
 531 int main(int argc, char *argv[]) {
 532         acl_t acl = acl_get_fd(0);
 533         return 0;
 534 }
 535 EOF
 536
 537         if test "$have_pkgconfig" = "yes" ; then
 538                 CFLAGS_ACL=$(pkg-config --cflags acl 2>/dev/null)
 539                 LDFLAGS_ACL=$(pkg-config --libs acl 2>/dev/null)
 540         fi
 541
 542         if test -z "$LDFLAGS_ACL"; then
 543                 CFLAGS_ACL=""
 544                 LDFLAGS_ACL="-lacl"
 545         fi
 546
 547         if $CC $CFLAGS $CFLAGS_ACL "$tmpc" \
 548                 $LDFLAGS $LDFLAGS_ACL -o "$tmpo" >/dev/null 2>&1; then
 549                 CONFIG_ACL=1
 550                 printf "%s\n" "yes"
 551         else
 552                 printf "%s\n" "no"
 553                 CFLAGS_ACL=""
 554                 LDFLAGS_ACL=""
 555                 test "$acl" = "yes" && fail "$0: cannot find libacl"
 556         fi
 557 fi
 558
 559 CONFIG_SELINUX=0
 560
 561 if test "$OS" = "Linux" -a "$selinux" != "no"; then
 562         printf "checking for libselinux... "
 563
 564 cat > "$tmpc" <<EOF
 565 #include <selinux/selinux.h>
 566
 567 int main(int argc, char *argv[]) {
 568         return is_selinux_enabled();
 569 }
 570 EOF
 571
 572         if test "$have_pkgconfig" = "yes" ; then
 573                 CFLAGS_SELINUX=$(pkg-config --cflags selinux 2>/dev/null)
 574                 LDFLAGS_SELINUX=$(pkg-config --libs selinux 2>/dev/null)
 575         fi
 576
 577         if test -z "$LDFLAGS_SELINUX"; then
 578                 CFLAGS_SELINUX=""
 579                 LDFLAGS_SELINUX="-lselinux"
 580         fi
 581
 582         if $CC $CFLAGS $CFLAGS_SELINUX "$tmpc" \
 583                 $LDFLAGS $LDFLAGS_SELINUX -o "$tmpo" >/dev/null 2>&1; then
 584                 CONFIG_SELINUX=1
 585                 printf "%s\n" "yes"
 586         else
 587                 printf "%s\n" "no"
 588                 CFLAGS_SELINUX=""
 589                 LDFLAGS_SELINUX=""
 590                 test "$selinux" = "yes" && fail "$0: cannot find libselinux"
 591         fi
 592 fi
 593
 594 printf "checking for memrchr... "
 595
 596 cat > "$tmpc" <<EOF
 597 #define _GNU_SOURCE
 598 #include <string.h>
 599
 600 int main(int argc, char *argv[]) {
 601         return !memrchr("\n", '\n', 1);
 602 }
 603 EOF
 604
 605 if $CC $CFLAGS "$tmpc" $LDFLAGS -o "$tmpo" >/dev/null 2>&1; then
 606         HAVE_MEMRCHR=1
 607         printf "%s\n" "yes"
 608 else
 609         HAVE_MEMRCHR=0
 610         printf "%s\n" "no"
 611 fi
 612
 613 printf "completing config.mk... "
 614
 615 exec 3>&1 1>>config.mk
 616
 617 cat << EOF
 618 CONFIG_HELP = $CONFIG_HELP
 619 CFLAGS_TERMKEY = $CFLAGS_TERMKEY
 620 LDFLAGS_TERMKEY = $LDFLAGS_TERMKEY
 621 CONFIG_CURSES = $CONFIG_CURSES
 622 CFLAGS_CURSES = $CFLAGS_CURSES
 623 LDFLAGS_CURSES = $LDFLAGS_CURSES
 624 REGEX_SRC = $REGEX_SRC
 625 CONFIG_TRE = $CONFIG_TRE
 626 CFLAGS_TRE = $CFLAGS_TRE
 627 LDFLAGS_TRE = $LDFLAGS_TRE
 628 CONFIG_LUA = $CONFIG_LUA
 629 CFLAGS_LUA = $CFLAGS_LUA
 630 LDFLAGS_LUA = $LDFLAGS_LUA
 631 CONFIG_LPEG = $CONFIG_LPEG
 632 CFLAGS_LPEG = $CFLAGS_LPEG
 633 LDFLAGS_LPEG = $LDFLAGS_LPEG
 634 CONFIG_ACL = $CONFIG_ACL
 635 CFLAGS_ACL = $CFLAGS_ACL
 636 LDFLAGS_ACL = $LDFLAGS_ACL
 637 CONFIG_SELINUX = $CONFIG_SELINUX
 638 CFLAGS_SELINUX = $CFLAGS_SELINUX
 639 LDFLAGS_SELINUX = $LDFLAGS_SELINUX
 640 CFLAGS_LIBC = -DHAVE_MEMRCHR=$HAVE_MEMRCHR
 641 EOF
 642 exec 1>&3 3>&-
 643
 644 test "$SRCDIR" = "." || ln -sf $SRCDIR/Makefile .
 645
 646 printf "done\n"