commit f08474ea0c5d4ad9266081d5f3dd0017448d2498
parent 13d5710c5af78365a5dd2699e8bad15b93aee773
Author: tgoodwin <tgoodwin>
Date: Thu, 19 Feb 1998 12:39:21 +0000
do preprocessor trick: it works now
Diffstat:
1 file changed, 23 insertions(+), 5 deletions(-)
diff --git a/configure.ac b/configure.ac
@@ -22,11 +22,28 @@ AC_CHECK_HEADERS(sys/resource.h sys/time.h sys/types.h unistd.h)
AC_HEADER_DIRENT
AC_HEADER_STDC
-dnl At some point, we might attempt to parse the output of saying
-dnl `#include <signal.h>' using something like
-dnl rc_cv_full_signal_h=`$CPP temp.c |sed -n 's/.*"\(.*signal.h\)".*/\1/p' |sort -u |sed 'y/\n/ /'`
-dnl (but that doesn't work quite right).
-rc_cv_full_signal_h='/usr/include/signal.h /usr/include/sys/signal.h /usr/include/asm/signal.h'
+
+dnl Most systems put the real signal names in /usr/include/sys/signal.h.
+dnl Linux puts them in /usr/include/asm/signal.h. CygWin32 puts them
+dnl somewhere else altogether. This hack attempts to parse the output
+dnl of saying `#include <signal.h>' to the preprocessor in order to find
+dnl the full path of files named signal.h. If this doesn't
+dnl produce any filenames, fall back to the (Unixoid) defaults.
+
+AC_CACHE_CHECK(for full paths of <signal.h>, rc_cv_full_signal_h, [
+ echo '#include <signal.h>' > temp.c
+ rc_cv_full_signal_h=`$CPP temp.c |sed -n 's/.*"\(.*signal.h\)".*/\1/p' |
+sort -u |tr '
+' ' '`
+ rm -f temp.c
+ case "$rc_cv_full_signal_h" in
+ '') rc_cv_full_signal_h='/usr/include/signal.h /usr/include/sys/signal.h /usr/include/asm/signal.h' ;;
+ esac
+])
+
+dnl Phew! We now have a list of <signal.h>s. Examine each one to see
+dnl if it contains the signal names we're after. If not, that's a a
+dnl configure error: bomb out.
AC_CACHE_CHECK(for signal names, rc_cv_signal_h,
for i in $rc_cv_full_signal_h; do
@@ -41,6 +58,7 @@ case "$rc_cv_signal_h" in
esac
AC_SUBST(SIGNAL_H)
+
AC_TYPE_GETGROUPS
AC_TYPE_PID_T
AC_TYPE_SIZE_T
