2 # configure script for zlib.
4 # Normally configure builds both a static and a shared library.
5 # If you want to build just a static library, use: ./configure --static
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)
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
16 # start off configure.log
17 echo -------------------- >> configure.log
18 echo $0 $* >> configure.log
21 # get source directory
23 if test $SRCDIR = "."; then
28 ZINC='-include zconf.h'
29 ZINCOUT='-I. -I$(SRCDIR)'
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}-"
39 # destination name for static library
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' < ${SRCDIR}zlib.h`
48 # establish commands for library building
49 if "${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 ${AR} | tee -a configure.log
54 test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
56 ARFLAGS=${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 ${RANLIB} | tee -a configure.log
61 RANLIB=${RANLIB-"ranlib"}
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 ${NM} | tee -a configure.log
70 # set defaults before processing command line options
71 LDCONFIG=${LDCONFIG-"ldconfig"}
72 LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
74 prefix=${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'}
92 OBJC='$(OBJZ) $(OBJG)'
93 PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)'
95 # leave this script, optionally in a bad way
98 if test "$*" != "0"; then
99 echo "** $0 aborting." | tee -a configure.log
101 rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version
102 echo -------------------- >> configure.log
103 echo >> configure.log
104 echo >> configure.log
108 # process command line options
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
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 ;;
141 echo "unknown option: $1" | tee -a configure.log
142 echo "$0 --help for help" | tee -a configure.log
147 # temporary file name
150 # put arguments in log, also put test file in log if used in arguments
155 echo === $test.c === >> configure.log
156 cat $test.c >> configure.log
157 echo === >> configure.log;;
159 echo $* >> configure.log
162 # check for gcc vs. cc and set compile and link flags based on the system identified by uname
164 extern int getchar();
165 int hello() {return getchar();}
168 test -z "$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
176 case `$cc -v 2>&1` in
181 if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
182 echo ... using gcc >> configure.log
184 CFLAGS="${CFLAGS--O3}"
185 SFLAGS="${CFLAGS--O3} -fPIC"
186 if test "$ARCHS"; then
187 CFLAGS="${CFLAGS} ${ARCHS}"
188 LDFLAGS="${LDFLAGS} ${ARCHS}"
190 if test $build64 -eq 1; then
191 CFLAGS="${CFLAGS} -m64"
192 SFLAGS="${SFLAGS} -m64"
194 if test "$warn" -eq 1; then
195 if test "$zconst" -eq 1; then
196 CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -pedantic -DZLIB_CONST"
198 CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
201 if test $debug -eq 1; then
202 CFLAGS="${CFLAGS} -DZLIB_DEBUG"
203 SFLAGS="${SFLAGS} -DZLIB_DEBUG"
205 if test -z "$uname"; then
206 uname=`(uname -s || echo unknown) 2>/dev/null`
209 Linux* | linux* | GNU | GNU/* | solaris*)
210 LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"} ;;
211 *BSD | *bsd* | DragonFly)
212 LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"}
213 LDCONFIG="ldconfig -m" ;;
214 CYGWIN* | Cygwin* | cygwin* | OS/2*)
218 rm -f $test.[co] $test $test$shared_ext
219 echo "Please use win32/Makefile.gcc instead." | tee -a configure.log
221 LDSHARED=${LDSHARED-"$cc -shared"}
224 QNX*) # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
225 # (alain.bonnefoy@icbt.com)
226 LDSHARED=${LDSHARED-"$cc -shared -Wl,-hlibz.so.1"} ;;
228 LDSHARED=${LDSHARED-"$cc -shared $SFLAGS"}
229 case `(uname -m || echo unknown) 2>/dev/null` in
232 SHAREDLIB='libz.so' ;;
235 SHAREDLIB='libz.sl' ;;
239 SHAREDLIB=libz$shared_ext
240 SHAREDLIBV=libz.$VER$shared_ext
241 SHAREDLIBM=libz.$VER1$shared_ext
242 LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
243 if libtool -V 2>&1 | grep Apple > /dev/null; then
246 AR="/usr/bin/libtool"
249 *) LDSHARED=${LDSHARED-"$cc -shared"} ;;
252 # find system name and corresponding cc options
255 echo ... using $CC >> configure.log
256 if test -z "$uname"; then
257 uname=`(uname -sr || echo unknown) 2>/dev/null`
260 HP-UX*) SFLAGS=${CFLAGS-"-O +z"}
261 CFLAGS=${CFLAGS-"-O"}
262 # LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
263 LDSHARED=${LDSHARED-"ld -b"}
264 case `(uname -m || echo unknown) 2>/dev/null` in
267 SHAREDLIB='libz.so' ;;
270 SHAREDLIB='libz.sl' ;;
272 IRIX*) SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
273 CFLAGS=${CFLAGS-"-ansi -O2"}
274 LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
275 OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
276 CFLAGS=${CFLAGS-"-O -std1"}
277 LDFLAGS="${LDFLAGS} -Wl,-rpath,."
278 LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"} ;;
279 OSF1*) SFLAGS=${CFLAGS-"-O -std1"}
280 CFLAGS=${CFLAGS-"-O -std1"}
281 LDSHARED=${LDSHARED-"cc -shared -Wl,-soname,libz.so.1"} ;;
282 QNX*) SFLAGS=${CFLAGS-"-4 -O"}
283 CFLAGS=${CFLAGS-"-4 -O"}
284 LDSHARED=${LDSHARED-"cc"}
285 RANLIB=${RANLIB-"true"}
288 SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
289 CFLAGS=${CFLAGS-"-O3"}
290 LDSHARED=${LDSHARED-"cc -dy -KPIC -G"} ;;
291 SunOS\ 5* | solaris*)
292 LDSHARED=${LDSHARED-"cc -G -h libz$shared_ext.$VER1"}
293 SFLAGS=${CFLAGS-"-fast -KPIC"}
294 CFLAGS=${CFLAGS-"-fast"}
295 if test $build64 -eq 1; then
296 # old versions of SunPRO/Workshop/Studio don't support -m64,
297 # but newer ones do. Check for it.
298 flag64=`$CC -flags | egrep -- '^-m64'`
299 if test x"$flag64" != x"" ; then
300 CFLAGS="${CFLAGS} -m64"
301 SFLAGS="${SFLAGS} -m64"
303 case `(uname -m || echo unknown) 2>/dev/null` in
305 SFLAGS="$SFLAGS -xarch=amd64"
306 CFLAGS="$CFLAGS -xarch=amd64" ;;
308 SFLAGS="$SFLAGS -xarch=v9"
309 CFLAGS="$CFLAGS -xarch=v9" ;;
313 if test -n "$ZINC"; then
314 ZINC='-I- -I. -I$(SRCDIR)'
317 SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
318 CFLAGS=${CFLAGS-"-O2"}
319 LDSHARED=${LDSHARED-"ld"} ;;
320 SunStudio\ 9*) SFLAGS=${CFLAGS-"-fast -xcode=pic32 -xtarget=ultra3 -xarch=v9b"}
321 CFLAGS=${CFLAGS-"-fast -xtarget=ultra3 -xarch=v9b"}
322 LDSHARED=${LDSHARED-"cc -xarch=v9b"} ;;
323 UNIX_System_V\ 4.2.0)
324 SFLAGS=${CFLAGS-"-KPIC -O"}
325 CFLAGS=${CFLAGS-"-O"}
326 LDSHARED=${LDSHARED-"cc -G"} ;;
328 SFLAGS=${CFLAGS-"-Kconform_pic -O"}
329 CFLAGS=${CFLAGS-"-O"}
330 LDSHARED=${LDSHARED-"cc -G"} ;;
332 SFLAGS=${CFLAGS-"-KPIC -O"}
333 CFLAGS=${CFLAGS-"-O"}
334 LDSHARED=${LDSHARED-"cc -G"} ;;
335 AIX*) # Courtesy of dbakker@arrayasolutions.com
336 SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
337 CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
338 LDSHARED=${LDSHARED-"xlc -G"} ;;
339 # send working options for other systems to zlib@gzip.org
340 *) SFLAGS=${CFLAGS-"-O"}
341 CFLAGS=${CFLAGS-"-O"}
342 LDSHARED=${LDSHARED-"cc -shared"} ;;
346 # destination names for shared library if not defined above
347 SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
348 SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
349 SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
351 echo >> configure.log
353 # define functions for testing compiler and library characteristics and logging the results
358 if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
362 test "`( $* ) 2>&1 | tee -a configure.log`" = ""
364 echo - using any output from compiler to indicate an error >> configure.log
369 ( $* ) >> configure.log 2>&1
371 if test $ret -ne 0; then
372 echo "(exit code "$ret")" >> configure.log
383 printf %s "$got" >> configure.log
384 if test $ret -ne 0; then
391 int foo() { return 0; }
393 echo "Checking for obsessive-compulsive compiler options..." >> configure.log
394 if try $CC -c $CFLAGS $test.c; then
397 echo "Compiler error reporting is too harsh for $0 (perhaps remove -Werror)." | tee -a configure.log
401 echo >> configure.log
403 # see if shared library build supported
405 extern int getchar();
406 int hello() {return getchar();}
408 if test $shared -eq 1; then
409 echo Checking for shared library support... | tee -a configure.log
410 # we must test in two steps (cc then ld), required at least on SunOS 4.x
411 if try $CC -w -c $SFLAGS $test.c &&
412 try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
413 echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
414 elif test -z "$old_cc" -a -z "$old_cflags"; then
415 echo No shared library support. | tee -a configure.log
418 echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
422 if test $shared -eq 0; then
425 TEST="all teststatic"
429 echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
432 TEST="all teststatic testshared"
435 # check for underscores in external names for use by assembler code
439 echo >> configure.log
440 show "$NM $test.o | grep _hello"
441 if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
442 CPP="$CPP -DNO_UNDERLINE"
443 echo Checking for underline in external names... No. | tee -a configure.log
445 echo Checking for underline in external names... Yes. | tee -a configure.log
449 echo >> configure.log
457 if try $CC -c $CFLAGS $test.c; then
458 echo "Checking for size_t... Yes." | tee -a configure.log
461 echo "Checking for size_t... No." | tee -a configure.log
465 echo >> configure.log
469 #include <sys/types.h>
472 if try $CC -c $CFLAGS $test.c; then
473 echo "Checking for ssize_t... Yes." | tee -a configure.log
476 echo "Checking for ssize_t... No." | tee -a configure.log
480 echo >> configure.log
482 # find the size_t integer type, if needed
483 if test $need_sizet -eq 1 -o $need_ssizet -eq 1; then
487 if try $CC -c $CFLAGS $test.c; then
488 echo "Checking for long long... Yes." | tee -a configure.log
492 if (sizeof(void *) <= sizeof(int)) puts("int");
493 else if (sizeof(void *) <= sizeof(long)) puts("long");
494 else puts("z_longlong");
499 echo "Checking for long long... No." | tee -a configure.log
503 if (sizeof(void *) <= sizeof(int)) puts("int");
509 if try $CC $CFLAGS -o $test $test.c; then
511 echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
513 echo "Failed to find a pointer-size integer type." | tee -a configure.log
518 if test $need_sizet -eq 1; then
519 CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
520 SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
523 if test $need_ssizet -eq 1; then
524 CFLAGS="${CFLAGS} -DNO_SSIZE_T=${sizet}"
525 SFLAGS="${SFLAGS} -DNO_SSIZE_T=${sizet}"
528 echo >> configure.log
530 # check for large file support, and if none, check for fseeko()
532 #include <sys/types.h>
535 if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
536 CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
537 SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
539 TEST="${TEST} test64"
540 echo "Checking for off64_t... Yes." | tee -a configure.log
541 echo "Checking for fseeko... Yes." | tee -a configure.log
543 echo "Checking for off64_t... No." | tee -a configure.log
544 echo >> configure.log
552 if try $CC $CFLAGS -o $test $test.c; then
553 echo "Checking for fseeko... Yes." | tee -a configure.log
555 CFLAGS="${CFLAGS} -DNO_FSEEKO"
556 SFLAGS="${SFLAGS} -DNO_FSEEKO"
557 echo "Checking for fseeko... No." | tee -a configure.log
561 echo >> configure.log
563 # check for strerror() for use by gz* functions
567 int main() { return strlen(strerror(errno)); }
569 if try $CC $CFLAGS -o $test $test.c; then
570 echo "Checking for strerror... Yes." | tee -a configure.log
572 CFLAGS="${CFLAGS} -DNO_STRERROR"
573 SFLAGS="${SFLAGS} -DNO_STRERROR"
574 echo "Checking for strerror... No." | tee -a configure.log
577 # copy clean zconf.h for subsequent edits
578 cp -p ${SRCDIR}zconf.h.in zconf.h
580 echo >> configure.log
582 # check for unistd.h and save result in zconf.h
585 int main() { return 0; }
587 if try $CC -c $CFLAGS $test.c; then
588 sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
589 mv zconf.temp.h zconf.h
590 echo "Checking for unistd.h... Yes." | tee -a configure.log
592 echo "Checking for unistd.h... No." | tee -a configure.log
595 echo >> configure.log
597 # check for stdarg.h and save result in zconf.h
600 int main() { return 0; }
602 if try $CC -c $CFLAGS $test.c; then
603 sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
604 mv zconf.temp.h zconf.h
605 echo "Checking for stdarg.h... Yes." | tee -a configure.log
607 echo "Checking for stdarg.h... No." | tee -a configure.log
610 # if the z_ prefix was requested, save that in zconf.h
611 if test $zprefix -eq 1; then
612 sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
613 mv zconf.temp.h zconf.h
614 echo >> configure.log
615 echo "Using z_ prefix on all symbols." | tee -a configure.log
618 # if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
619 if test $solo -eq 1; then
620 sed '/#define ZCONF_H/a\
623 ' < zconf.h > zconf.temp.h
624 mv zconf.temp.h zconf.h
626 PIC_OBJC='$(PIC_OBJZ)'
629 # if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
630 if test $cover -eq 1; then
631 CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
632 if test -n "$GCC_CLASSIC"; then
637 echo >> configure.log
639 # conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
640 # (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
641 # return value. The most secure result is vsnprintf() with a return value. snprintf() with a
642 # return value is secure as well, but then gzprintf() will be limited to 20 arguments.
655 if try $CC -c $CFLAGS $test.c; then
656 echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
658 echo >> configure.log
662 int mytest(const char *fmt, ...)
667 vsnprintf(buf, sizeof(buf), fmt, ap);
673 return (mytest("Hello%d\n", 1));
676 if try $CC $CFLAGS -o $test $test.c; then
677 echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
679 echo >> configure.log
683 int mytest(const char *fmt, ...)
689 n = vsnprintf(buf, sizeof(buf), fmt, ap);
695 return (mytest("Hello%d\n", 1));
699 if try $CC -c $CFLAGS $test.c; then
700 echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
702 CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
703 SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
704 echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
705 echo " WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
706 echo " can build but will be open to possible string-format security" | tee -a configure.log
707 echo " vulnerabilities." | tee -a configure.log
710 CFLAGS="$CFLAGS -DNO_vsnprintf"
711 SFLAGS="$SFLAGS -DNO_vsnprintf"
712 echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
713 echo " WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
714 echo " can build but will be open to possible buffer-overflow security" | tee -a configure.log
715 echo " vulnerabilities." | tee -a configure.log
717 echo >> configure.log
721 int mytest(const char *fmt, ...)
727 n = vsprintf(buf, fmt, ap);
733 return (mytest("Hello%d\n", 1));
737 if try $CC -c $CFLAGS $test.c; then
738 echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
740 CFLAGS="$CFLAGS -DHAS_vsprintf_void"
741 SFLAGS="$SFLAGS -DHAS_vsprintf_void"
742 echo "Checking for return value of vsprintf()... No." | tee -a configure.log
743 echo " WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
744 echo " can build but will be open to possible string-format security" | tee -a configure.log
745 echo " vulnerabilities." | tee -a configure.log
749 echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
751 echo >> configure.log
757 snprintf(buf, sizeof(buf), "%s", "foo");
766 if try $CC $CFLAGS -o $test $test.c; then
767 echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
769 echo >> configure.log
775 return snprintf(buf, sizeof(buf), "%s", "foo");
783 if try $CC -c $CFLAGS $test.c; then
784 echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
786 CFLAGS="$CFLAGS -DHAS_snprintf_void"
787 SFLAGS="$SFLAGS -DHAS_snprintf_void"
788 echo "Checking for return value of snprintf()... No." | tee -a configure.log
789 echo " WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
790 echo " can build but will be open to possible string-format security" | tee -a configure.log
791 echo " vulnerabilities." | tee -a configure.log
794 CFLAGS="$CFLAGS -DNO_snprintf"
795 SFLAGS="$SFLAGS -DNO_snprintf"
796 echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
797 echo " WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
798 echo " can build but will be open to possible buffer-overflow security" | tee -a configure.log
799 echo " vulnerabilities." | tee -a configure.log
801 echo >> configure.log
807 return sprintf(buf, "%s", "foo");
815 if try $CC -c $CFLAGS $test.c; then
816 echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
818 CFLAGS="$CFLAGS -DHAS_sprintf_void"
819 SFLAGS="$SFLAGS -DHAS_sprintf_void"
820 echo "Checking for return value of sprintf()... No." | tee -a configure.log
821 echo " WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
822 echo " can build but will be open to possible string-format security" | tee -a configure.log
823 echo " vulnerabilities." | tee -a configure.log
828 # see if we can hide zlib internal symbols that are linked between separate source files
829 if test "$gcc" -eq 1; then
830 echo >> configure.log
832 #define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
833 int ZLIB_INTERNAL foo;
839 if tryboth $CC -c $CFLAGS $test.c; then
840 CFLAGS="$CFLAGS -DHAVE_HIDDEN"
841 SFLAGS="$SFLAGS -DHAVE_HIDDEN"
842 echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
844 echo "Checking for attribute(visibility) support... No." | tee -a configure.log
848 # show the results in the log
849 echo >> configure.log
850 echo ALL = $ALL >> configure.log
851 echo AR = $AR >> configure.log
852 echo ARFLAGS = $ARFLAGS >> configure.log
853 echo CC = $CC >> configure.log
854 echo CFLAGS = $CFLAGS >> configure.log
855 echo CPP = $CPP >> configure.log
856 echo EXE = $EXE >> configure.log
857 echo LDCONFIG = $LDCONFIG >> configure.log
858 echo LDFLAGS = $LDFLAGS >> configure.log
859 echo LDSHARED = $LDSHARED >> configure.log
860 echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
861 echo OBJC = $OBJC >> configure.log
862 echo PIC_OBJC = $PIC_OBJC >> configure.log
863 echo RANLIB = $RANLIB >> configure.log
864 echo SFLAGS = $SFLAGS >> configure.log
865 echo SHAREDLIB = $SHAREDLIB >> configure.log
866 echo SHAREDLIBM = $SHAREDLIBM >> configure.log
867 echo SHAREDLIBV = $SHAREDLIBV >> configure.log
868 echo STATICLIB = $STATICLIB >> configure.log
869 echo TEST = $TEST >> configure.log
870 echo VER = $VER >> configure.log
871 echo Z_U4 = $Z_U4 >> configure.log
872 echo SRCDIR = $SRCDIR >> configure.log
873 echo exec_prefix = $exec_prefix >> configure.log
874 echo includedir = $includedir >> configure.log
875 echo libdir = $libdir >> configure.log
876 echo mandir = $mandir >> configure.log
877 echo prefix = $prefix >> configure.log
878 echo sharedlibdir = $sharedlibdir >> configure.log
879 echo uname = $uname >> configure.log
881 # udpate Makefile with the configure results
882 sed < ${SRCDIR}Makefile.in "
884 /^CFLAGS *=/s#=.*#=$CFLAGS#
885 /^SFLAGS *=/s#=.*#=$SFLAGS#
886 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
887 /^LDSHARED *=/s#=.*#=$LDSHARED#
888 /^CPP *=/s#=.*#=$CPP#
889 /^STATICLIB *=/s#=.*#=$STATICLIB#
890 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
891 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
892 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
894 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
895 /^RANLIB *=/s#=.*#=$RANLIB#
896 /^LDCONFIG *=/s#=.*#=$LDCONFIG#
897 /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
898 /^EXE *=/s#=.*#=$EXE#
899 /^SRCDIR *=/s#=.*#=$SRCDIR#
900 /^ZINC *=/s#=.*#=$ZINC#
901 /^ZINCOUT *=/s#=.*#=$ZINCOUT#
902 /^prefix *=/s#=.*#=$prefix#
903 /^exec_prefix *=/s#=.*#=$exec_prefix#
904 /^libdir *=/s#=.*#=$libdir#
905 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
906 /^includedir *=/s#=.*#=$includedir#
907 /^mandir *=/s#=.*#=$mandir#
908 /^OBJC *=/s#=.*#= $OBJC#
909 /^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
910 /^all: */s#:.*#: $ALL#
911 /^test: */s#:.*#: $TEST#
914 # create zlib.pc with the configure results
915 sed < ${SRCDIR}zlib.pc.in "
917 /^CFLAGS *=/s#=.*#=$CFLAGS#
918 /^CPP *=/s#=.*#=$CPP#
919 /^LDSHARED *=/s#=.*#=$LDSHARED#
920 /^STATICLIB *=/s#=.*#=$STATICLIB#
921 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
922 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
923 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
925 /^ARFLAGS *=/s#=.*#=$ARFLAGS#
926 /^RANLIB *=/s#=.*#=$RANLIB#
927 /^EXE *=/s#=.*#=$EXE#
928 /^prefix *=/s#=.*#=$prefix#
929 /^exec_prefix *=/s#=.*#=$exec_prefix#
930 /^libdir *=/s#=.*#=$libdir#
931 /^sharedlibdir *=/s#=.*#=$sharedlibdir#
932 /^includedir *=/s#=.*#=$includedir#
933 /^mandir *=/s#=.*#=$mandir#
934 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
936 s/\@VERSION\@/$VER/g;