configure.in: Try to determine CRT_DIR automatically when using gcc

1 files changed, 15 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 9e7ea8522b2..60b4d55be51 100644
--- a/configure.in
+++ b/configure.in
@@ -988,6 +988,21 @@ dnl Do this early because it can frob feature test macros for Unix-98 &c.
 AC_SYS_LARGEFILE
 
 
+## If we're using gcc, and the user hasn't specified a crt-dir, try to
+## determine it automatically by asking gcc.  [If this doesn't work,
+## CRT_DIR will remain empty and system-dependent code will be used
+## below.]
+##
+if test "x${GCC}z$CRT_DIR" = xyesz; then
+   crt_file=`$CC 2>/dev/null --print-file-name=crt1.o`
+   case "$crt_file" in
+     */*)
+       CRT_DIR=`AS_DIRNAME(["$crt_file"])`
+       ;;
+   esac
+fi
+
+
 ## If user specified a crt-dir, use that unconditionally.
 if test "X$CRT_DIR" = "X"; then