diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 39b45b5f..9c791069 100644 --- a/configure.ac +++ b/configure.ac @@ -50,9 +50,30 @@ if test $perfmon_support = yes; then LDFLAGS="$LDFLAGS -DPERFMON -L$with_perfmon/lib -lpfm" fi + +dnl If the user didn't specify --enable-prologues/--disable-prologues +dnl and the x86 system has a version of gcc less than version 4, +dnl automatically enable prologues. +if test "${enable_prologues+set}" != set; then + AC_MSG_CHECKING([to see if prologue searching should be the default]) + if { echo '#if __i386__ == 1 && __GNUC__ < 4' + echo ' yes ' + echo '#endif'; } | ${CC} -E - | grep yes > /dev/null; then + enable_prologues=yes + AC_MSG_RESULT([yes]) + else + AC_MSG_RESULT([no]) + fi +fi + AC_ARG_ENABLE(prologues, AC_HELP_STRING([--enable-prologues],[make -P prologue-searching default]), - AC_DEFINE([ENABLE_PROLOGUES],[],[make -P prologue-searching default])) + [ +if test "$enable_prologues" = yes; then + AC_DEFINE([ENABLE_PROLOGUES],[],[make -P prologue-searching default]) +fi]) + + build_elfutils=no AC_ARG_WITH([elfutils], |