avoid triggering gcc's -Wunsafe-loop-optimizations in EDSP

[apt.git] / buildlib / tools.m4

diff --git a/buildlib/tools.m4 b/buildlib/tools.m4
index c0e638b717b08464a8cd109b2b882ed6d85a5234..433d5ca329d7d63609fc4539ac6b74bcefe5b5ec 100644 (file)
--- a/buildlib/tools.m4
+++ b/buildlib/tools.m4
@@ -1,4 +1,4 @@
-AC_DEFUN(ah_HAVE_GETCONF,
+AC_DEFUN([ah_HAVE_GETCONF],
        [AC_ARG_WITH(getconf,
                [  --with-getconf          Enable automagical buildtime configuration],
                [if test "$withval" = "yes"; then
@@ -14,7 +14,7 @@ AC_DEFUN(ah_HAVE_GETCONF,
 ])
 
 dnl ah_GET_CONF(variable, value ..., [default])
-AC_DEFUN(ah_GET_GETCONF,
+AC_DEFUN([ah_GET_GETCONF],
        [AC_REQUIRE([ah_HAVE_GETCONF])
        if test ! -z "$GETCONF";then
                old_args="[$]@"
@@ -28,7 +28,7 @@ AC_DEFUN(ah_GET_GETCONF,
                eval $1="$3"
        fi
 ])
-AC_DEFUN(ah_NUM_CPUS,
+AC_DEFUN([ah_NUM_CPUS],
        [AC_MSG_CHECKING([number of cpus])
        AC_ARG_WITH(cpus,
                [  --with-cpus             The number of cpus to be used for building(see --with-procs, default 1)],
@@ -56,7 +56,7 @@ AC_DEFUN(ah_NUM_CPUS,
        AC_MSG_RESULT([$ah_NUM_CPUS_msg])
        AC_SUBST(NUM_CPUS)
 ])
-AC_DEFUN(ah_PROC_MULTIPLY,
+AC_DEFUN([ah_PROC_MULTIPLY],
        [AC_REQUIRE([ah_NUM_CPUS])
        AC_MSG_CHECKING([processor multiplier])
        AC_ARG_WITH(proc-multiply,
@@ -72,7 +72,7 @@ AC_DEFUN(ah_PROC_MULTIPLY,
        AC_SUBST(PROC_MULTIPLY)
 ])
 
-AC_DEFUN(ah_NUM_PROCS,
+AC_DEFUN([ah_NUM_PROCS],
        [AC_REQUIRE([ah_PROC_MULTIPLY])
        AC_REQUIRE([ah_NUM_CPUS])
        AC_MSG_CHECKING([number of processes to run during make])
@@ -89,49 +89,22 @@ AC_DEFUN(ah_NUM_PROCS,
        AC_SUBST(NUM_PROCS)
 ])
 
-AC_DEFUN(ah_GLIBC_VER,
-       [AC_MSG_CHECKING([glibc version])
-       dummy=if$$
-       cat <<_GLIBC_>$dummy.c
-#include <features.h>
-#include <stdio.h>
-#include <stdlib.h>
-int main(int argc, char **argv) { printf("libc6.%d",__GLIBC_MINOR__); exit(0); }
-_GLIBC_
-       ${CC-cc} $dummy.c -o $dummy
-       if test "$?" = 0; then
-               GLIBC_VER=`./$dummy`
-               AC_MSG_RESULT([$GLIBC_VER])
-               GLIBC_VER="-$GLIBC_VER"
+AC_DEFUN([ah_GCC3DEP],[
+       AC_MSG_CHECKING(if $CXX -MD works)
+       touch gcc3dep.cc
+       ${CXX-c++} -MD -o gcc3dep_test.o -c gcc3dep.cc
+       rm -f gcc3dep.cc gcc3dep_test.o
+       if test -e gcc3dep.d; then
+               rm -f gcc3dep.d
+               GCC_MD=input
+               GCC3DEP=
+       elif test -e gcc3dep_test.d; then
+               rm -f gcc3dep_test.d
+               GCC_MD=output
+               GCC3DEP=yes
        else
-               AC_MSG_WARN([cannot determine GNU C library minor version number])
+               AC_MSG_ERROR(no)
        fi
-       rm -f $dummy $dummy.c
-       AC_SUBST(GLIBC_VER)
-])
-
-AC_DEFUN(ah_LIBSTDCPP_VER,
-       [AC_MSG_CHECKING([libstdc++ version])
-       dummy=if$$
-       cat <<_LIBSTDCPP_>$dummy.cc
-#include <features.h>
-#include <stdio.h>
-#include <stdlib.h>
-int main(int argc, char **argv) { exit(0); }
-_LIBSTDCPP_
-       ${CXX-c++} $dummy.cc -o $dummy
-
-       if test "$?" = 0; then
-               soname=`objdump -p ./$dummy |grep NEEDED|grep libstd`
-               LIBSTDCPP_VER=`echo $soname | sed -e 's/.*NEEDED.*libstdc++-libc.*-\(.*\).so.\(.*\)/\2-\1/'`
-       fi
-       rm -f $dummy $dummy.cc
-
-       if test -z "$LIBSTDCPP_VER"; then
-               AC_MSG_WARN([cannot determine standard C++ library version number])
-       else
-               AC_MSG_RESULT([$LIBSTDCPP_VER])
-               LIBSTDCPP_VER="-$LIBSTDCPP_VER"
-       fi
-       AC_SUBST(LIBSTDCPP_VER)
+       AC_MSG_RESULT([yes, for $GCC_MD])
+       AC_SUBST(GCC3DEP)
 ])