https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69153
Bug ID: 69153
Summary: --with-advance-toolchain configure option does not
correctly set configure variable target_header_dir
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bergner at gcc dot gnu.org
Target Milestone: ---
The --with-advance-toolchain configure option is supposed to build a GCC that
uses the header files, libraries and dynamic linker from the specified Advance
Toolchain (AT) release, rather than the system files.
In testing a new configure fragment for a new builtin that requires a specific
GLIBC version, I noticed that the configure testing was using the system header
files instead of the AT's header files. This was due to $target_header_dir not
being set correctly. The following code which sets it doesn't handle
--with-advance-toolchain at all:
if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
if test "x$with_headers" != x; then
target_header_dir=$with_headers
elif test "x$with_sysroot" = x; then
target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
elif test "x$with_build_sysroot" != "x"; then
target_header_dir="${with_build_sysroot}${native_system_header_dir}"
elif test "x$with_sysroot" = xyes; then
target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
else
target_header_dir="${with_sysroot}${native_system_header_dir}"
fi
else
target_header_dir=${native_system_header_dir}
fi
I'm testing the following patch to fix this:
Index: configure.ac
===================================================================
--- configure.ac (revision 231201)
+++ configure.ac (working copy)
@@ -1997,7 +1997,9 @@
SYSTEM_HEADER_DIR=$build_system_header_dir
fi
-if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
+if test "x$with_advance_toolchain" != x; then
+ target_header_dir=`find /opt/$with_advance_toolchain/ -path
'*/include/features.h' | sed -e 's#/features.h##'`
+elif test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
if test "x$with_headers" != x; then
target_header_dir=$with_headers
elif test "x$with_sysroot" = x; then
