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authorSimon Baldwin <simonb@google.com>2012-11-16 17:14:05 +0000
committerSimon Baldwin <simonb@gcc.gnu.org>2012-11-16 17:14:05 +0000
commit5dc99c46786e91f2892c4318ed36054302e0c964 (patch)
tree709320b578253406cba90335431f68194bf6b70a /gcc/doc
parentb185792f5216497c74664bdf9ba2d465628d6f4c (diff)
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cpplib.h (struct cpp_options): Add canonical_system_headers.
* include/cpplib.h (struct cpp_options): Add canonical_system_headers. * files.c (find_file_in_dir): Call maybe_shorter_path() only if canonical_system_headers is set. * init.c (cpp_create_reader): Initialize canonical_system_headers. * configure.ac: Add new --enable-canonical-system-headers. * configure: Regenerate. * config.in: Regenerate. * doc/cppopts.texi: Document -f[no-]canonical-system-headers. * doc/install.texi: Document --enable-canonical-system-headers. * c.opt: Add f[no-]canonical-system-headers. * c-opts.c (c_common_handle_option): Handle OPT_fcanonical_system_headers. From-SVN: r193569
Diffstat (limited to 'gcc/doc')
-rw-r--r--gcc/doc/cppopts.texi4
-rw-r--r--gcc/doc/install.texi8
2 files changed, 12 insertions, 0 deletions
diff --git a/gcc/doc/cppopts.texi b/gcc/doc/cppopts.texi
index a2eb79d..37e0b7b5 100644
--- a/gcc/doc/cppopts.texi
+++ b/gcc/doc/cppopts.texi
@@ -564,6 +564,10 @@ Accept universal character names in identifiers. This option is
experimental; in a future version of GCC, it will be enabled by
default for C99 and C++.
+@item -fno-canonical-system-headers
+@opindex fno-canonical-system-headers
+When preprocessing, do not shorten system header paths with canonicalization.
+
@item -fpreprocessed
@opindex fpreprocessed
Indicate to the preprocessor that the input file has already been
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 7396158..b78d127 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -1719,6 +1719,14 @@ link time when @option{-fuse-linker-plugin} is enabled.
This linker should have plugin support such as gold starting with
version 2.20 or GNU ld starting with version 2.21.
See @option{-fuse-linker-plugin} for details.
+
+@item --enable-canonical-system-headers
+@itemx --disable-canonical-system-headers
+Enable system header path canonicalization for @file{libcpp}. This can
+produce shorter header file paths in diagnostics and dependency output
+files, but these changed header paths may conflict with some compilation
+environments. Enabled by default, and may be disabled using
+@option{--disable-canonical-system-headers}.
@end table
@subheading Cross-Compiler-Specific Options