source/libs/zlib/zlib-src/configure

   1 #!/bin/sh
   2 # configure script for zlib.
   3 #
   4 # Normally configure builds both a static and a shared library.
   5 # If you want to build just a static library, use: ./configure --static
   6 #
   7 # To impose specific compiler or flags or install directory, use for example:
   8 #    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
   9 # or for csh/tcsh users:
  10 #    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
  11
  12 # Incorrect settings of CC or CFLAGS may prevent creating a shared library.
  13 # If you have problems, try without defining CC and CFLAGS before reporting
  14 # an error.
  15
  16 # start off configure.log
  17 echo -------------------- >> configure.log
  18 echo $0 $* >> configure.log
  19 date >> configure.log
  20
  21 # set command prefix for cross-compilation
  22 if [ -n "${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