manywarnings: Add support for C++.

* build-aux/g++-warning.spec: New file.
* m4/manywarnings-c++.m4: New file.
* modules/manywarnings (Files): Add it.

1 files changed, 100 insertions, 0 deletions

diff --git a/build-aux/g++-warning.spec b/build-aux/g++-warning.spec
new file mode 100644
index 0000000000..ae3e86676d
--- /dev/null
+++ b/build-aux/g++-warning.spec
@@ -0,0 +1,100 @@
+# options to filter out, and why
+--all-warnings				alias for -Wall
+--extra-warnings			alias for -Wextra
+-frequire-return-statement		go
+-Waggregate-return			obsolescent
+-Waliasing				fortran
+-Walign-commons				fortran
+-Wampersand				fortran
+-Warray-bounds				covered by -Warray-bounds=
+-Warray-bounds=				handled specially by gl_MANYWARN_ALL_GCC
+-Warray-temporaries			fortran
+-Wassign-intercept			objc/objc++
+-Wbad-function-cast			c
+-Wc++0x-compat				c++ compatibility
+-Wc++11-compat				c++ compatibility
+-Wc++14-compat				c++ compatibility
+-Wc90-c99-compat			c compatibility
+-Wc99-c11-compat			c compatibility
+-Wcast-qual				FIXME maybe? too much noise; encourages bad changes
+-Wcast-result				d
+-Wc-binding-type			fortran
+-Wc++-compat				FIXME maybe? borderline.  some will want this
+-Wcharacter-truncation			fortran
+-Wcompare-reals				fortran
+-Wconversion-extra			fortran
+-Wconversion				FIXME maybe? too much noise; encourages bad changes
+-Wdeclaration-after-statement		FIXME: do not want.  others may
+-Wdesignated-init			c
+-Wdiscarded-array-qualifiers		c
+-Wdiscarded-qualifiers			c
+-Werror-implicit-function-declaration	deprecated
+-Wfloat-conversion			FIXME maybe? borderline.  some will want this
+-Wfloat-equal				FIXME maybe? borderline.  some will want this
+-Wformat				covered by -Wformat=2
+-Wformat=				gcc --help=warnings artifact
+-Wframe-larger-than=<number>		FIXME: choose something sane?
+-Wfunction-elimination			fortran
+-Wimplicit				c
+-Wimplicit-function-declaration		c
+-Wimplicit-int				c
+-Wimplicit-interface			fortran
+-Wimplicit-procedure			fortran
+-Wincompatible-pointer-types		c
+-Wint-conversion			c
+-Winteger-division			fortran
+-Wintrinsic-shadow			fortran
+-Wintrinsics-std			fortran
+-Wjump-misses-init			c
+-Wlarger-than-				gcc --help=warnings artifact
+-Wlarger-than=<number>			FIXME: choose something sane?
+-Wline-truncation			fortran
+-Wlong-long				obsolescent
+-Wmissing-format-attribute		obsolescent
+-Wmissing-noreturn			obsolescent
+-Wmissing-parameter-type		c
+-Wmissing-prototypes			c
+-Wnested-externs			c
+-Wnormalized				covered by -Wnormalized=
+-Wnormalized=<none|id|nfc|nfkc>		handled specially by gl_MANYWARN_ALL_GCC
+-Wold-style-declaration			c
+-Wold-style-definition			c
+-Woverride-init				c
+-Wpadded				FIXME maybe?  warns about "stabil" member in /usr/include/bits/timex.h
+-Wpedantic				FIXME: too strict?
+-Wpointer-sign				c
+-Wpointer-to-int-cast			c
+-Wproperty-assign-default		objc++
+-Wprotocol				objc++
+-Wrealloc-lhs-all			fortran
+-Wrealloc-lhs				fortran
+-Wreal-q-constant			fortran
+-Wredundant-decls			FIXME maybe? many _gl_cxxalias_dummy FPs
+-Wselector				objc and objc++
+-Wshadow-ivar				objc
+-Wshift-overflow			covered by -Wshift-overflow=2
+-Wshift-overflow=			gcc --help=warnings artifact
+-Wsign-compare				FIXME maybe? borderline.  some will want this
+-Wsign-conversion			FIXME maybe? borderline.  some will want this
+-Wstack-usage=				FIXME: choose something sane?
+-Wstrict-aliasing=			FIXME: choose something sane?
+-Wstrict-overflow=			FIXME: choose something sane?
+-Wstrict-prototypes			c
+-Wstrict-selector-match			objc and objc++
+-Wsurprising				fortran
+-Wswitch-enum				FIXME maybe? borderline.  some will want this
+-Wsynth					deprecated
+-Wtabs					fortran
+-Wtarget-lifetime			fortran
+-Wtraditional-conversion		obsolescent
+-Wtraditional				obsolescent
+-Wundeclared-selector			objc and objc++
+-Wundef					FIXME maybe? too many false positives
+-Wunderflow				fortran
+-Wunreachable-code			obsolescent no-op
+-Wunsuffixed-float-constants		triggers warning in gnulib's timespec.h
+-Wunused-const-variable			covered by -Wunusec-const-variable=2
+-Wunused-const-variable=		gcc --help=warnings artifact
+-Wunused-dummy-argument			fortran
+-Wuse-without-only			fortran
+-Wzerotrip				fortran