On 2011/11/16 00:47:10, shenhan wrote:
2011-11-15 Han Shen <mailto:[email protected]>
* gcc/Makefile.in:
* gcc/configure:
* gcc/cppdefault.c:
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index ae4f4da..0a05783 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -615,6 +615,7 @@ gcc_tooldir = @gcc_tooldir@
build_tooldir = $(exec_prefix)/$(target_noncanonical)
# Directory in which the compiler finds target-independent g++
includes.
gcc_gxx_include_dir = @gcc_gxx_include_dir@
+gcc_gxx_include_dir_add_sysroot = @gcc_gxx_include_dir_add_sysroot@
# Directory to search for site-specific includes.
local_includedir = $(local_prefix)/include
includedir = $(prefix)/include
@@ -3979,6 +3980,7 @@ PREPROCESSOR_DEFINES = \
-DGCC_INCLUDE_DIR=\"$(libsubdir)/include\" \
-DFIXED_INCLUDE_DIR=\"$(libsubdir)/include-fixed\" \
-DGPLUSPLUS_INCLUDE_DIR=\"$(gcc_gxx_include_dir)\" \
+
-DGPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT=$(gcc_gxx_include_dir_add_sysroot) \
-DGPLUSPLUS_TOOL_INCLUDE_DIR=\"$(gcc_gxx_include_dir)/$(target_noncanonical)\"
\
-DGPLUSPLUS_BACKWARD_INCLUDE_DIR=\"$(gcc_gxx_include_dir)/backward\" \
-DLOCAL_INCLUDE_DIR=\"$(local_includedir)\" \
diff --git a/gcc/configure b/gcc/configure
index 99334ce..364d8c2 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -638,6 +638,7 @@ host_xm_include_list
host_xm_file_list
host_exeext
gcc_gxx_include_dir
+gcc_gxx_include_dir_add_sysroot
gcc_config_arguments
float_h_file
extra_programs
@@ -3291,12 +3292,20 @@ gcc_gxx_include_dir=
# Specify the g++ header file directory
# Check whether --with-gxx-include-dir was given.
+gcc_gxx_include_dir_add_sysroot=0
if test "${with_gxx_include_dir+set}" = set; then :
withval=$with_gxx_include_dir; case "${withval}" in
yes) as_fn_error "bad value ${withval} given for g++ include
directory"
"$LINENO" 5 ;;
no) ;;
*) gcc_gxx_include_dir=$with_gxx_include_dir ;;
esac
+ if test "${with_sysroot+set}" = set; then :
+ gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" :
"${with_sysroot}"'\(.*\)'`
+ if test "${gcc_gxx_without_sysroot}"; then :
+ gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
+ gcc_gxx_include_dir_add_sysroot=1
+ fi
+ fi
fi
diff --git a/gcc/cppdefault.c b/gcc/cppdefault.c
index 099899a..e8341d5 100644
--- a/gcc/cppdefault.c
+++ b/gcc/cppdefault.c
@@ -44,15 +44,15 @@ const struct default_include
cpp_include_defaults[]
= {
#ifdef GPLUSPLUS_INCLUDE_DIR
/* Pick up GNU C++ generic include files. */
- { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
+ { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,
GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0
},
#endif
#ifdef GPLUSPLUS_TOOL_INCLUDE_DIR
/* Pick up GNU C++ target-dependent include files. */
- { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, 0, 1 },
+ { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,
GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },
#endif
#ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR
/* Pick up GNU C++ backward and deprecated include files. */
- { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, 0, 0 },
+ { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,
GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
#endif
#ifdef GCC_INCLUDE_DIR
/* This is the dir for gcc's private headers. */
--
This patch is available for review at
http://codereview.appspot.com/5394041
Hi, this is a follow up for issue
"http://codereview.appspot.com/4641076";.
The issue description from that issue is copied below:
=========================
The setup:
Configuring a toolchain targeting x86-64 GNU Linux (Ubuntu Lucid), as a
cross-compiler. Using a sysroot to provide the Lucid headers+libraries,
with the sysroot path being within the GCC install tree. Want to use
the
Lucid system libstdc++ and headers, which means that I'm not
building/installing libstdc++-v3.
So, configuring with:
--with-sysroot="$SYSROOT"
--disable-libstdc++-v3 \
--with-gxx-include-dir="$SYSROOT/usr/include/c++/4.4" \
(among other options).
Hoping to support two usage models with this configuration, w.r.t. use
of
the sysroot:
(1) somebody installs the sysroot in the normal location relative to the
GCC install, and relocates the whole bundle (sysroot+GCC). This works
great AFAICT, GCC finds its includes (including the C++ includes) thanks
to the add_standard_paths iprefix handling.
(2) somebody installs the sysroot in a non-standard location, and uses
--sysroot to try to access it. This works fine for the C headers, but
doesn't work.
For the C headers, add_standard_paths prepends the sysroot location to
the /usr/include path (since that's what's specified in cppdefault.c for
that path). It doesn't do the same for the C++ include path, though
(again, as specified in cppdefault.c).
add_standard_paths doesn't attempt to relocate built-in include paths
that
start with the compiled-in sysroot location (e.g., the g++ include dir,
in
this case). This isn't surprising really: normally you either prepend
the
sysroot location or you don't (as specified by cppdefault.c); none of
the
built-in paths normally *start* with the sysroot location and need to be
relocated. However, in this odd-ball case of trying to use the C++
headers
from the sysroot, one of the paths *does* need to be relocated in this
way.
========================
Chris(cgd@) provided a patch for the issue, but Joseph had a different
opinion,
my patch here is just coded as suggested.
http://codereview.appspot.com/5394041/
