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* diagnostic.h (diagnostic_classification_change_t): New. (diagnostic_context): Add history and push/pop list. (diagnostic_push_diagnostics): Declare. (diagnostic_pop_diagnostics): Declare. * diagnostic.c (diagnostic_classify_diagnostic): Store changes from pragmas in a history chain instead of the global table. (diagnostic_push_diagnostics): New. (diagnostic_pop_diagnostics): New. (diagnostic_report_diagnostic): Scan history chain to find state of diagnostics as of the diagnostic location. * opts.c (set_option): Pass UNKNOWN_LOCATION to diagnostic_classify_diagnostic. (enable_warning_as_error): Likewise. * diagnostic-core.h (DK_POP): Add after "real" diagnostics, for use in the history chain. * c-family/c-pragma.c (handle_pragma_diagnostic): Add push/pop, allow these pragmas anywhere. * doc/extend.texi: Document pragma GCC diagnostic changes. * gcc.dg/pragma-diag-1.c: New. From-SVN: r161115
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully.