+ ALL="static"
+ TEST="all teststatic"
+ SHAREDLIB=""
+ SHAREDLIBV=""
+ SHAREDLIBM=""
+ echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
+else
+ ALL="static shared"
+ TEST="all teststatic testshared"
+fi
+
+# check for underscores in external names for use by assembler code
+CPP=${CPP-"$CC -E"}
+case $CFLAGS in
+ *ASMV*)
+ echo >> configure.log
+ show "$NM $test.o | grep _hello"
+ if test "`$NM $test.o | grep _hello | tee -a configure.log`" = ""; then
+ CPP="$CPP -DNO_UNDERLINE"
+ echo Checking for underline in external names... No. | tee -a configure.log
+ else
+ echo Checking for underline in external names... Yes. | tee -a configure.log
+ fi ;;
+esac
+
+echo >> configure.log
+
+# check for size_t
+cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdlib.h>
+size_t dummy = 0;
+EOF
+if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for size_t... Yes." | tee -a configure.log
+else
+ echo "Checking for size_t... No." | tee -a configure.log
+ # find a size_t integer type
+ # check for long long
+ cat > $test.c << EOF
+long long dummy = 0;
+EOF
+ if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for long long... Yes." | tee -a configure.log
+ cat > $test.c <<EOF
+#include <stdio.h>
+int main(void) {
+ if (sizeof(void *) <= sizeof(int)) puts("int");
+ else if (sizeof(void *) <= sizeof(long)) puts("long");
+ else puts("z_longlong");
+ return 0;
+}
+EOF
+ else
+ echo "Checking for long long... No." | tee -a configure.log
+ cat > $test.c <<EOF
+#include <stdio.h>
+int main(void) {
+ if (sizeof(void *) <= sizeof(int)) puts("int");
+ else puts("long");
+ return 0;
+}
+EOF
+ fi
+ if try $CC $CFLAGS -o $test $test.c; then
+ sizet=`./$test`
+ echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
+ CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
+ SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
+ else
+ echo "Checking for a pointer-size integer type... not found." | tee -a configure.log
+ fi
+fi
+
+echo >> configure.log
+
+# check for large file support, and if none, check for fseeko()
+cat > $test.c <<EOF
+#include <sys/types.h>
+off64_t dummy = 0;
+EOF
+if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
+ CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
+ SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
+ ALL="${ALL} all64"
+ TEST="${TEST} test64"
+ echo "Checking for off64_t... Yes." | tee -a configure.log
+ echo "Checking for fseeko... Yes." | tee -a configure.log
+else
+ echo "Checking for off64_t... No." | tee -a configure.log
+ echo >> configure.log
+ cat > $test.c <<EOF
+#include <stdio.h>
+int main(void) {
+ fseeko(NULL, 0, 0);
+ return 0;
+}
+EOF
+ if try $CC $CFLAGS -o $test $test.c; then
+ echo "Checking for fseeko... Yes." | tee -a configure.log
+ else
+ CFLAGS="${CFLAGS} -DNO_FSEEKO"
+ SFLAGS="${SFLAGS} -DNO_FSEEKO"
+ echo "Checking for fseeko... No." | tee -a configure.log
+ fi
+fi
+
+echo >> configure.log
+
+# check for strerror() for use by gz* functions
+cat > $test.c <<EOF
+#include <string.h>
+#include <errno.h>
+int main() { return strlen(strerror(errno)); }
+EOF
+if try $CC $CFLAGS -o $test $test.c; then
+ echo "Checking for strerror... Yes." | tee -a configure.log
+else
+ CFLAGS="${CFLAGS} -DNO_STRERROR"
+ SFLAGS="${SFLAGS} -DNO_STRERROR"
+ echo "Checking for strerror... No." | tee -a configure.log
+fi
+
+# copy clean zconf.h for subsequent edits
+cp -p ${SRCDIR}zconf.h.in zconf.h
+
+echo >> configure.log
+
+# check for unistd.h and save result in zconf.h
+cat > $test.c <<EOF
+#include <unistd.h>
+int main() { return 0; }
+EOF
+if try $CC -c $CFLAGS $test.c; then
+ sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
+ mv zconf.temp.h zconf.h
+ echo "Checking for unistd.h... Yes." | tee -a configure.log
+else
+ echo "Checking for unistd.h... No." | tee -a configure.log
+fi
+
+echo >> configure.log
+
+# check for stdarg.h and save result in zconf.h
+cat > $test.c <<EOF
+#include <stdarg.h>
+int main() { return 0; }
+EOF
+if try $CC -c $CFLAGS $test.c; then
+ sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
+ mv zconf.temp.h zconf.h
+ echo "Checking for stdarg.h... Yes." | tee -a configure.log
+else
+ echo "Checking for stdarg.h... No." | tee -a configure.log
+fi
+
+# if the z_ prefix was requested, save that in zconf.h
+if test $zprefix -eq 1; then
+ sed < zconf.h "/#ifdef Z_PREFIX.* may be/s/def Z_PREFIX\(.*\) may be/ 1\1 was/" > zconf.temp.h
+ mv zconf.temp.h zconf.h
+ echo >> configure.log
+ echo "Using z_ prefix on all symbols." | tee -a configure.log
+fi
+
+# if --solo compilation was requested, save that in zconf.h and remove gz stuff from object lists
+if test $solo -eq 1; then
+ sed '/#define ZCONF_H/a\
+#define Z_SOLO
+
+' < zconf.h > zconf.temp.h
+ mv zconf.temp.h zconf.h
+OBJC='$(OBJZ)'
+PIC_OBJC='$(PIC_OBJZ)'
+fi
+
+# if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
+if test $cover -eq 1; then
+ CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
+ if test -n "$GCC_CLASSIC"; then
+ CC=$GCC_CLASSIC
+ fi
+fi
+
+echo >> configure.log
+
+# conduct a series of tests to resolve eight possible cases of using "vs" or "s" printf functions
+# (using stdarg or not), with or without "n" (proving size of buffer), and with or without a
+# return value. The most secure result is vsnprintf() with a return value. snprintf() with a
+# return value is secure as well, but then gzprintf() will be limited to 20 arguments.
+cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+#include "zconf.h"
+int main()
+{
+#ifndef STDC
+ choke me
+#endif
+ return 0;
+}
+EOF
+if try $CC -c $CFLAGS $test.c; then
+ echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()." | tee -a configure.log
+
+ echo >> configure.log
+ cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+int mytest(const char *fmt, ...)
+{
+ char buf[20];
+ va_list ap;
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return 0;
+}
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+ if try $CC $CFLAGS -o $test $test.c; then
+ echo "Checking for vsnprintf() in stdio.h... Yes." | tee -a configure.log
+
+ echo >> configure.log
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+int mytest(const char *fmt, ...)
+{
+ int n;
+ char buf[20];
+ va_list ap;
+ va_start(ap, fmt);
+ n = vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return n;
+}
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+
+ if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for return value of vsnprintf()... Yes." | tee -a configure.log
+ else
+ CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
+ SFLAGS="$SFLAGS -DHAS_vsnprintf_void"
+ echo "Checking for return value of vsnprintf()... No." | tee -a configure.log
+ echo " WARNING: apparently vsnprintf() does not return a value. zlib" | tee -a configure.log
+ echo " can build but will be open to possible string-format security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_vsnprintf"
+ SFLAGS="$SFLAGS -DNO_vsnprintf"
+ echo "Checking for vsnprintf() in stdio.h... No." | tee -a configure.log
+ echo " WARNING: vsnprintf() not found, falling back to vsprintf(). zlib" | tee -a configure.log
+ echo " can build but will be open to possible buffer-overflow security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+
+ echo >> configure.log
+ cat >$test.c <<EOF
+#include <stdio.h>
+#include <stdarg.h>
+int mytest(const char *fmt, ...)
+{
+ int n;
+ char buf[20];
+ va_list ap;
+ va_start(ap, fmt);
+ n = vsprintf(buf, fmt, ap);
+ va_end(ap);
+ return n;
+}
+int main()
+{
+ return (mytest("Hello%d\n", 1));
+}
+EOF
+
+ if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for return value of vsprintf()... Yes." | tee -a configure.log
+ else
+ CFLAGS="$CFLAGS -DHAS_vsprintf_void"
+ SFLAGS="$SFLAGS -DHAS_vsprintf_void"
+ echo "Checking for return value of vsprintf()... No." | tee -a configure.log
+ echo " WARNING: apparently vsprintf() does not return a value. zlib" | tee -a configure.log
+ echo " can build but will be open to possible string-format security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+ fi
+ fi
+else
+ echo "Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf()." | tee -a configure.log
+
+ echo >> configure.log
+ cat >$test.c <<EOF
+#include <stdio.h>
+int mytest()
+{
+ char buf[20];
+ snprintf(buf, sizeof(buf), "%s", "foo");
+ return 0;
+}
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if try $CC $CFLAGS -o $test $test.c; then
+ echo "Checking for snprintf() in stdio.h... Yes." | tee -a configure.log
+
+ echo >> configure.log
+ cat >$test.c <<EOF
+#include <stdio.h>
+int mytest()
+{
+ char buf[20];
+ return snprintf(buf, sizeof(buf), "%s", "foo");
+}
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for return value of snprintf()... Yes." | tee -a configure.log
+ else
+ CFLAGS="$CFLAGS -DHAS_snprintf_void"
+ SFLAGS="$SFLAGS -DHAS_snprintf_void"
+ echo "Checking for return value of snprintf()... No." | tee -a configure.log
+ echo " WARNING: apparently snprintf() does not return a value. zlib" | tee -a configure.log
+ echo " can build but will be open to possible string-format security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+ fi
+ else
+ CFLAGS="$CFLAGS -DNO_snprintf"
+ SFLAGS="$SFLAGS -DNO_snprintf"
+ echo "Checking for snprintf() in stdio.h... No." | tee -a configure.log
+ echo " WARNING: snprintf() not found, falling back to sprintf(). zlib" | tee -a configure.log
+ echo " can build but will be open to possible buffer-overflow security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+
+ echo >> configure.log
+ cat >$test.c <<EOF
+#include <stdio.h>
+int mytest()
+{
+ char buf[20];
+ return sprintf(buf, "%s", "foo");
+}
+int main()
+{
+ return (mytest());
+}
+EOF
+
+ if try $CC -c $CFLAGS $test.c; then
+ echo "Checking for return value of sprintf()... Yes." | tee -a configure.log
+ else
+ CFLAGS="$CFLAGS -DHAS_sprintf_void"
+ SFLAGS="$SFLAGS -DHAS_sprintf_void"
+ echo "Checking for return value of sprintf()... No." | tee -a configure.log
+ echo " WARNING: apparently sprintf() does not return a value. zlib" | tee -a configure.log
+ echo " can build but will be open to possible string-format security" | tee -a configure.log
+ echo " vulnerabilities." | tee -a configure.log
+ fi
+ fi
+fi
+
+# see if we can hide zlib internal symbols that are linked between separate source files
+if test "$gcc" -eq 1; then
+ echo >> configure.log
+ cat > $test.c <<EOF
+#define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
+int ZLIB_INTERNAL foo;
+int main()
+{
+ return 0;
+}
+EOF
+ if tryboth $CC -c $CFLAGS $test.c; then
+ CFLAGS="$CFLAGS -DHAVE_HIDDEN"
+ SFLAGS="$SFLAGS -DHAVE_HIDDEN"
+ echo "Checking for attribute(visibility) support... Yes." | tee -a configure.log
+ else
+ echo "Checking for attribute(visibility) support... No." | tee -a configure.log
+ fi
+fi
+
+# show the results in the log
+echo >> configure.log
+echo ALL = $ALL >> configure.log
+echo AR = $AR >> configure.log
+echo ARFLAGS = $ARFLAGS >> configure.log
+echo CC = $CC >> configure.log
+echo CFLAGS = $CFLAGS >> configure.log
+echo CPP = $CPP >> configure.log
+echo EXE = $EXE >> configure.log
+echo LDCONFIG = $LDCONFIG >> configure.log
+echo LDFLAGS = $LDFLAGS >> configure.log
+echo LDSHARED = $LDSHARED >> configure.log
+echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
+echo OBJC = $OBJC >> configure.log
+echo PIC_OBJC = $PIC_OBJC >> configure.log
+echo RANLIB = $RANLIB >> configure.log
+echo SFLAGS = $SFLAGS >> configure.log
+echo SHAREDLIB = $SHAREDLIB >> configure.log
+echo SHAREDLIBM = $SHAREDLIBM >> configure.log
+echo SHAREDLIBV = $SHAREDLIBV >> configure.log
+echo STATICLIB = $STATICLIB >> configure.log
+echo TEST = $TEST >> configure.log
+echo VER = $VER >> configure.log
+echo SRCDIR = $SRCDIR >> configure.log
+echo exec_prefix = $exec_prefix >> configure.log
+echo includedir = $includedir >> configure.log
+echo libdir = $libdir >> configure.log
+echo mandir = $mandir >> configure.log
+echo prefix = $prefix >> configure.log
+echo sharedlibdir = $sharedlibdir >> configure.log
+echo uname = $uname >> configure.log
+
+# udpate Makefile with the configure results
+sed < ${SRCDIR}Makefile.in "
+/^CC *=/s#=.*#=$CC#
+/^CFLAGS *=/s#=.*#=$CFLAGS#
+/^SFLAGS *=/s#=.*#=$SFLAGS#
+/^LDFLAGS *=/s#=.*#=$LDFLAGS#
+/^LDSHARED *=/s#=.*#=$LDSHARED#
+/^CPP *=/s#=.*#=$CPP#
+/^STATICLIB *=/s#=.*#=$STATICLIB#
+/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
+/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
+/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
+/^AR *=/s#=.*#=$AR#
+/^ARFLAGS *=/s#=.*#=$ARFLAGS#
+/^RANLIB *=/s#=.*#=$RANLIB#
+/^LDCONFIG *=/s#=.*#=$LDCONFIG#
+/^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
+/^EXE *=/s#=.*#=$EXE#
+/^SRCDIR *=/s#=.*#=$SRCDIR#
+/^ZINC *=/s#=.*#=$ZINC#
+/^ZINCOUT *=/s#=.*#=$ZINCOUT#
+/^prefix *=/s#=.*#=$prefix#
+/^exec_prefix *=/s#=.*#=$exec_prefix#
+/^libdir *=/s#=.*#=$libdir#
+/^sharedlibdir *=/s#=.*#=$sharedlibdir#
+/^includedir *=/s#=.*#=$includedir#
+/^mandir *=/s#=.*#=$mandir#
+/^OBJC *=/s#=.*#= $OBJC#
+/^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
+/^all: */s#:.*#: $ALL#
+/^test: */s#:.*#: $TEST#