From bfac1564633d0f0184369fd152e5c8b46c1137ca Mon Sep 17 00:00:00 2001 From: Mark Adler Date: Sat, 9 Jun 2012 22:42:24 -0700 Subject: [PATCH] Fix configure check for veracity of compiler error return codes. There were two problems before that this fixes. One was that the check for the compiler error return code preceded the determination of the compiler and its options. The other was that the checks for compiler and library characteristics could be fooled if the error options were set to reject K&R-style C. configure now aborts if the compiler produces a hard error on K&R-style C. In addition, aborts of configure are now consistent, and remove any temporary files. --- configure | 143 ++++++++++++++++++++++++++++++++---------------------- 1 file changed, 85 insertions(+), 58 deletions(-) diff --git a/configure b/configure index 8876707..a69d7bf 100755 --- a/configure +++ b/configure @@ -77,6 +77,19 @@ old_cflags="$CFLAGS" OBJC='$(OBJZ) $(OBJG)' PIC_OBJC='$(PIC_OBJZ) $(PIC_OBJG)' +# leave this script, optionally in a bad way +leave() +{ + if test "$*" != "0"; then + echo "** $0 aborting." | tee -a configure.log + fi + rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version + echo -------------------- >> configure.log + echo >> configure.log + echo >> configure.log + exit $1 +} + # process command line options while test $# -ge 1 do @@ -106,13 +119,17 @@ case "$1" in -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;; --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;; --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;; - *) echo "unknown option: $1"; echo "$0 --help for help" | tee -a configure.log; exit 1 ;; + *) + echo "unknown option: $1" | tee -a configure.log + echo "$0 --help for help" | tee -a configure.log + leave 1;; esac done -# define functions for testing compiler and library characteristics and logging the results +# temporary file name test=ztest$$ +# put arguments in log, also put test file in log if used in arguments show() { case "$*" in @@ -124,43 +141,6 @@ show() echo $* >> configure.log } -cat > $test.c </dev/null; then - try() - { - show $* - test "`( $* ) 2>&1 | tee -a configure.log`" = "" - } - echo - using any output from compiler to indicate an error >> configure.log -else - try() - { - show $* - ( $* ) >> configure.log 2>&1 - ret=$? - if test $ret -ne 0; then - echo "(exit code "$ret")" >> configure.log - fi - return $ret - } -fi - -tryboth() -{ - show $* - got=`( $* ) 2>&1` - ret=$? - printf %s "$got" >> configure.log - if test $ret -ne 0; then - return $ret - fi - test "$got" = "" -} - -echo >> configure.log - # check for gcc vs. cc and set compile and link flags based on the system identified by uname cat > $test.c <&1` in *gcc*) gcc=1 ;; esac -show $cc -c $cflags $test.c -if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) >> configure.log 2>&1; then +show $cc -c $test.c +if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then echo ... using gcc >> configure.log CC="$cc" CFLAGS="${CFLAGS--O3} ${ARCHS}" @@ -208,7 +188,7 @@ if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) >> configure.log 2>&1; then # temporary bypass rm -f $test.[co] $test $test$shared_ext echo "Please use win32/Makefile.gcc instead." | tee -a configure.log - exit 1 + leave 1 LDSHARED=${LDSHARED-"$cc -shared"} LDSHAREDLIBC="" EXE='.exe' ;; @@ -338,7 +318,59 @@ SHAREDLIBM=${SHAREDLIBM-"libz$shared_ext.$VER1"} echo >> configure.log +# define functions for testing compiler and library characteristics and logging the results + +cat > $test.c </dev/null; then + try() + { + show $* + test "`( $* ) 2>&1 | tee -a configure.log`" = "" + } + echo - using any output from compiler to indicate an error >> configure.log +else +try() +{ + show $* + ( $* ) >> configure.log 2>&1 + ret=$? + if test $ret -ne 0; then + echo "(exit code "$ret")" >> configure.log + fi + return $ret +} +fi + +tryboth() +{ + show $* + got=`( $* ) 2>&1` + ret=$? + printf %s "$got" >> configure.log + if test $ret -ne 0; then + return $ret + fi + test "$got" = "" +} + +cat > $test.c << EOF +int foo() { return 0; } +EOF +echo "Checking for obsessive-compulsive compiler options..." >> configure.log +if ! try $CC -c $CFLAGS $test.c; then + echo "Compiler error reporting is too harsh for $0 (perhaps remove -Werror)." | tee -a configure.log + leave 1 +fi + +echo >> configure.log + # see if shared library build supported +cat > $test.c <> configure.log - # check for underscores in external names for use by assembler code CPP=${CPP-"$CC -E"} case $CFLAGS in @@ -709,14 +739,14 @@ cat > $test.c < #define is32(n,t) for(n=1,k=0;n;n<<=1,k++);if(k==32){puts(t);return 0;} int main() { - int k; - unsigned i; - unsigned long l; - unsigned short s; - is32(i, "unsigned") - is32(l, "unsigned long") - is32(s, "unsigned short") - return 1; + int k; + unsigned i; + unsigned long l; + unsigned short s; + is32(i, "unsigned") + is32(l, "unsigned long") + is32(s, "unsigned short") + return 1; } EOF Z_U4="" @@ -728,9 +758,6 @@ else echo "Looking for a four-byte integer type... Not found." | tee -a configure.log fi -# clean up files produced by running the compiler and linker -rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version - # show the results in the log echo >> configure.log echo ALL = $ALL >> configure.log @@ -762,9 +789,6 @@ echo mandir = $mandir >> configure.log echo prefix = $prefix >> configure.log echo sharedlibdir = $sharedlibdir >> configure.log echo uname = $uname >> configure.log -echo -------------------- >> configure.log -echo >> configure.log -echo >> configure.log # udpate Makefile with the configure results sed < Makefile.in " @@ -820,3 +844,6 @@ sed < zlib.pc.in " " | sed -e " s/\@VERSION\@/$VER/g; " > zlib.pc + +# done +leave 0