Add macro for detecting the output filename for gcc -MD...

Author: doogie
Date: 2001-05-29 05:25:06 GMT
Add macro for detecting the output filename for gcc -MD(3.0 changed it).

diff --git a/buildlib/tools.m4 b/buildlib/tools.m4
index cb57bb34fdbd0c74944b34754cc4a8675bf12514..9ad0bd05a1d4df8be09a4a1f3f709e2d554ba702 100644 (file)
--- a/buildlib/tools.m4
+++ b/buildlib/tools.m4
@@ -135,3 +135,23 @@ _LIBSTDCPP_
        fi
        AC_SUBST(LIBSTDCPP_VER)
 ])
+
+AC_DEFUN(ah_GCC3DEP,[
+       AC_MSG_CHECKING(if $CXX -MD works)
+       touch gcc3dep.cc
+       ${CXX-c++} -MD -o gcc3dep_test.o -c gcc3dep.cc
+       rm -f gcc3dep.cc gcc3dep_test.o
+       if test -e gcc3dep.d; then
+               rm -f gcc3dep.d
+               GCC_MD=input
+               GCC3DEP=no
+       elif test -e gcc3dep_test.d; then
+               rm -f gcc3dep_test.d
+               GCC_MD=output
+               GCC3DEP=yes
+       else
+               AC_MSG_ERROR(no)
+       fi
+       AC_MSG_RESULT([yes, for $GCC_MD])
+       AC_SUBST(GCC3DEP)
+])

diff --git a/configure.in b/configure.in
index f8d2cc1d6edcf6234cb57caf68e93272524e8fb8..7d551bfb1fbe84d9a60a16288cb9e0ffefba32e7 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -161,5 +161,6 @@ dnl AC_CHECK_PROG(YODL_MAN,yodl2man,"yes","")
 ah_NUM_PROCS
 ah_GLIBC_VER
 ah_LIBSTDCPP_VER
+ah_GCC3DEP
 
 AC_OUTPUT(environment.mak:buildlib/environment.mak.in makefile:buildlib/makefile.in,make -s dirs)