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