From fb2675cb4683a430fb63af44713cd9d2fcd77b97 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 23 Nov 2016 10:06:07 +0000 Subject: system.h (HAVE_DESIGNATED_INITIALIZERS, [...]): Do not use "defined" in macros. gcc: 2016-11-23 Paolo Bonzini * system.h (HAVE_DESIGNATED_INITIALIZERS, HAVE_DESIGNATED_UNION_INITIALIZERS): Do not use "defined" in macros. * doc/cpp.texi (Defined): Mention -Wexpansion-to-defined. * doc/cppopts.texi (Invocation): Document -Wexpansion-to-defined. * doc/invoke.texi (Warning Options): Document -Wexpansion-to-defined. gcc/c-family: 2016-11-23 Paolo Bonzini * c.opt (Wexpansion-to-defined): New. gcc/testsuite: 2016-11-23 Paolo Bonzini * gcc.dg/cpp/defined.c: Mark newly introduced warnings and adjust for warning->pedwarn change. * gcc.dg/cpp/defined-syshdr.c, gcc.dg/cpp/defined-Wexpansion-to-defined.c, gcc.dg/cpp/defined-Wextra-Wno-expansion-to-defined.c, gcc.dg/cpp/defined-Wextra.c, gcc.dg/cpp/defined-Wno-expansion-to-defined.c: New testcases. libcpp: 2016-11-23 Paolo Bonzini * include/cpplib.h (struct cpp_options): Add new member warn_expansion_to_defined. (CPP_W_EXPANSION_TO_DEFINED): New enum member. * expr.c (parse_defined): Warn for all uses of "defined" in macros, and tie warning to CPP_W_EXPANSION_TO_DEFINED. Make it a pedwarning instead of a warning. * system.h (HAVE_DESIGNATED_INITIALIZERS): Do not use "defined" in macros. From-SVN: r242743 --- gcc/doc/cpp.texi | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'gcc/doc/cpp.texi') diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index ed91767bc96..49aa95369a0 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -3369,7 +3369,9 @@ If the @code{defined} operator appears as a result of a macro expansion, the C standard says the behavior is undefined. GNU cpp treats it as a genuine @code{defined} operator and evaluates it normally. It will warn wherever your code uses this feature if you use the command-line option -@option{-pedantic}, since other compilers may handle it differently. +@option{-Wpedantic}, since other compilers may handle it differently. The +warning is also enabled by @option{-Wextra}, and can also be enabled +individually with @option{-Wexpansion-to-defined}. @node Else @subsection Else -- cgit v1.2.1