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Search path environment variables for cross-compilers. See the discussion
at <http://gcc.gnu.org/ml/gcc/2013-02/msg00124.html>.
--- gcc-4.7.2/gcc/incpath.c 2012-01-27 00:34:58.000000000 +0100
+++ gcc-4.7.2/gcc/incpath.c 2013-02-12 10:11:27.000000000 +0100
@@ -452,7 +452,7 @@ register_include_chains (cpp_reader *pfi
/* CPATH and language-dependent environment variables may add to the
include chain. */
- add_env_var_paths ("CPATH", BRACKET);
+ add_env_var_paths ("CROSS_CPATH", BRACKET);
add_env_var_paths (lang_env_vars[idx], SYSTEM);
target_c_incpath.extra_pre_includes (sysroot, iprefix, stdinc);
--- gcc-4.7.2/gcc/system.h 2012-02-17 00:16:28.000000000 +0100
+++ gcc-4.7.2/gcc/system.h 2013-02-12 10:22:17.000000000 +0100
@@ -1023,4 +1023,6 @@ helper_const_non_const_cast (const char
#define DEBUG_VARIABLE
#endif
+#define LIBRARY_PATH_ENV "CROSS_LIBRARY_PATH"
+
#endif /* ! GCC_SYSTEM_H */
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