On 2011/11/16 00:47:10, shenhan wrote:
2011-11-15 Han Shen <mailto:shen...@google.com>
* 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/