diff options
Diffstat (limited to 'ares/configure.ac')
| -rw-r--r-- | ares/configure.ac | 36 |
1 files changed, 15 insertions, 21 deletions
diff --git a/ares/configure.ac b/ares/configure.ac index 6aaf47896..d90d70b0c 100644 --- a/ares/configure.ac +++ b/ares/configure.ac @@ -160,11 +160,22 @@ case $host in # esac -CURL_CHECK_DEF([__xlc__]) -if test "$curl_cv_have_def___xlc__" = "yes"; then - dnl Force xlc to stop after the compilation phase, and not - dnl generate object code file when compilation has errors. +AC_MSG_CHECKING([whether we are using the IBM C compiler]) +CURL_CHECK_DEF([__IBMC__], [], [silent]) +if test "$curl_cv_have_def___IBMC__" = "yes"; then + AC_MSG_RESULT([yes]) + dnl Ensure that compiler optimizations are always thread-safe. + CFLAGS="$CFLAGS -qthreaded" + dnl Disable type based strict aliasing optimizations, using worst + dnl case aliasing assumptions when compiling. Type based aliasing + dnl would restrict the lvalues that could be safely used to access + dnl a data object. + CFLAGS="$CFLAGS -qnoansialias" + dnl Force compiler to stop after the compilation phase, without + dnl generating an object code file when compilation has errors. CFLAGS="$CFLAGS -qhalt=e" +else + AC_MSG_RESULT([no]) fi CURL_CHECK_COMPILER_HALT_ON_ERROR @@ -429,23 +440,6 @@ if test "x$RECENTAIX" = "xyes"; then AC_DEFINE(_THREAD_SAFE, 1, [define this if you need it to compile thread-safe code]) - dnl check if this is the IBM xlc compiler - dnl Details thanks to => http://predef.sourceforge.net/ - AC_MSG_CHECKING([if this is the xlc compiler]) - AC_EGREP_CPP([^__xlC__], [__xlC__], - dnl action if the text is found, this it has not been replaced by the - dnl cpp - XLC="no" - AC_MSG_RESULT([no]), - dnl the text was not found, it was replaced by the cpp - XLC="yes" - AC_MSG_RESULT([yes]) - CFLAGS="$CFLAGS -qthreaded" - dnl AIX xlc has to have strict aliasing turned off. If not, - dnl the optimizer assumes that pointers can only point to - dnl an object of the same type. - CFLAGS="$CFLAGS -qnoansialias" - ) fi |