Have ./configure use the compiler return code for error indication.
Previously ./configure would use any output on stderr as an indication that the compilation failed. However if some compiler wrapper uses stderr for some other purpose, e.g. distcc for nodes going down, then ./configure would not properly configure the build. This problem was noted by Mike Frysinger. For backwards compatibility, ./configure will revert to the old way, i.e. checking for anything on stderr, if when it deliberately runs the compiler with an error, a zero exit status is returned.
This commit is contained in:
Mark Adler
parent
5a5dd2c793
commit
2d55657c03
44
configure
vendored
44
configure
vendored
@ -97,6 +97,22 @@ case "$1" in
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done
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test=ztest$$
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cat > $test.c <<EOF
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#error error
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EOF
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if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
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try()
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{
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test "`( $* ) 2>&1`" = ""
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}
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else
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try()
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{
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( $* ) 2>/dev/null
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}
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fi
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cat > $test.c <<EOF
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extern int getchar();
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int hello() {return getchar();}
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@ -249,8 +265,8 @@ SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"}
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if test $shared -eq 1; then
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echo Checking for shared library support...
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# we must test in two steps (cc then ld), required at least on SunOS 4.x
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if test "`($CC -w -c $SFLAGS $test.c) 2>&1`" = "" &&
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test "`($LDSHARED $SFLAGS -o $test$shared_ext $test.o) 2>&1`" = ""; then
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if try $CC -w -c $SFLAGS $test.c &&
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try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
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echo Building shared library $SHAREDLIBV with $CC.
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elif test -z "$old_cc" -a -z "$old_cflags"; then
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echo No shared library support.
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@ -281,7 +297,7 @@ cat > $test.c <<EOF
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#include <sys/types.h>
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off64_t dummy = 0;
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EOF
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if test "`($CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
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CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
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SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
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ALL="${ALL} all64"
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@ -297,7 +313,7 @@ int main(void) {
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return 0;
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}
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EOF
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if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
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if try $CC $CFLAGS -o $test $test.c; then
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echo "Checking for fseeko... Yes."
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else
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CFLAGS="${CFLAGS} -DNO_FSEEKO"
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@ -312,7 +328,7 @@ cat > $test.c <<EOF
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#include <unistd.h>
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int main() { return 0; }
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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sed < zconf.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
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mv zconf.temp.h zconf.h
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echo "Checking for unistd.h... Yes."
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@ -324,7 +340,7 @@ cat > $test.c <<EOF
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#include <stdarg.h>
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int main() { return 0; }
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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sed < zconf.h "/^#ifdef HAVE_STDARG_H.* may be/s/def HAVE_STDARG_H\(.*\) may be/ 1\1 was/" > zconf.temp.h
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mv zconf.temp.h zconf.h
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echo "Checking for stdarg.h... Yes."
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@ -367,7 +383,7 @@ int main()
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking whether to use vs[n]printf() or s[n]printf()... using vs[n]printf()."
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cat > $test.c <<EOF
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@ -390,7 +406,7 @@ int main()
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return (mytest("Hello%d\n", 1));
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}
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EOF
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if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
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if try $CC $CFLAGS -o $test $test.c; then
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echo "Checking for vsnprintf() in stdio.h... Yes."
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cat >$test.c <<EOF
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@ -415,7 +431,7 @@ int main()
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking for return value of vsnprintf()... Yes."
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else
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CFLAGS="$CFLAGS -DHAS_vsnprintf_void"
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@ -455,7 +471,7 @@ int main()
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking for return value of vsprintf()... Yes."
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else
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CFLAGS="$CFLAGS -DHAS_vsprintf_void"
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@ -486,7 +502,7 @@ int main()
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}
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EOF
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if test "`($CC $CFLAGS -o $test $test.c) 2>&1`" = ""; then
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if try $CC $CFLAGS -o $test $test.c; then
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echo "Checking for snprintf() in stdio.h... Yes."
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cat >$test.c <<EOF
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@ -505,7 +521,7 @@ int main()
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking for return value of snprintf()... Yes."
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else
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CFLAGS="$CFLAGS -DHAS_snprintf_void"
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@ -539,7 +555,7 @@ int main()
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking for return value of sprintf()... Yes."
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else
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CFLAGS="$CFLAGS -DHAS_sprintf_void"
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@ -565,7 +581,7 @@ int main()
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return 0;
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}
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EOF
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if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
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if try $CC -c $CFLAGS $test.c; then
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echo "Checking for attribute(visibility) support... Yes."
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else
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CFLAGS="$CFLAGS -DNO_VIZ"
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