X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/fdba65036a5bb3940bf98a7dfd9851f45751e562..e732412dc851ef0f068c03d613e042c95b3bb5bb:/buildlib/tools.m4?ds=sidebyside

diff --git a/buildlib/tools.m4 b/buildlib/tools.m4
index cb57bb34f..9a8d744f2 100644
--- a/buildlib/tools.m4
+++ b/buildlib/tools.m4
@@ -89,8 +89,9 @@ AC_DEFUN(ah_NUM_PROCS,
 	AC_SUBST(NUM_PROCS)
 ])
 
-AC_DEFUN(ah_GLIBC_VER,
+AC_DEFUN(rc_GLIBC_VER,
 	[AC_MSG_CHECKING([glibc version])
+	AC_CACHE_VAL(ac_cv_glibc_ver,
 	dummy=if$$
 	cat <<_GLIBC_>$dummy.c
 #include <features.h>
@@ -102,15 +103,17 @@ _GLIBC_
 	if test "$?" = 0; then
 		GLIBC_VER=`./$dummy`
 		AC_MSG_RESULT([$GLIBC_VER])
-		GLIBC_VER="-$GLIBC_VER"
+		ac_cv_glibc_ver=$GLIBC_VER
 	else
 		AC_MSG_WARN([cannot determine GNU C library minor version number])
 	fi
 	rm -f $dummy $dummy.c
+	)
+	GLIBC_VER="-$ac_cv_glibc_ver"
 	AC_SUBST(GLIBC_VER)
 ])
 
-AC_DEFUN(ah_LIBSTDCPP_VER,
+AC_DEFUN(rc_LIBSTDCPP_VER,
 	[AC_MSG_CHECKING([libstdc++ version])
 	dummy=if$$
 	cat <<_LIBSTDCPP_>$dummy.cc
@@ -135,3 +138,23 @@ _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=
+	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)
+])