svn commit: r345708 - in head: lib/clang lib/libc++ lib/libc++experimental lib/libc++fs lib/libclang_rt lib/libcxxrt lib/libgcc_eh lib/libomp lib/ofed/libibnetdisc share/mk usr.bin/dtc usr.sbin/pmc
Enji Cooper
ngie at FreeBSD.org
Fri Mar 29 18:45:31 UTC 2019
Author: ngie
Date: Fri Mar 29 18:45:27 2019
New Revision: 345708
URL: https://svnweb.freebsd.org/changeset/base/345708
Log:
Standardize `-std=c++* as `CXXSTD`
CXXSTD was added as the C++ analogue to CSTD.
CXXSTD defaults to `-std=c++11` with supporting compilers; `-std=gnu++98`,
otherwise for older versions of g++.
This change standardizes the CXXSTD variable, originally added to
googletest.test.inc.mk as part of r345203.
As part of this effort, convert all `CXXFLAGS+= -std=*` calls to use `CXXSTD`.
Notes:
This value is not sanity checked in bsd.sys.mk, however, given the two
most used C++ compilers on FreeBSD (clang++ and g++) support both modes, it is
likely to work with both toolchains. This method will be refined in the future
to support more variants of C++, as not all versions of clang++ and g++ (for
instance) support C++14, C++17, etc.
Any manual appending of `-std=*` to `CXXFLAGS` should be replaced with CXXSTD.
Example:
Before this commit:
```
CXXFLAGS+= -std=c++14
```
After this commit:
```
CXXSTD= c++14
```
Reviewed by: asomers
Approved by: emaste (mentor)
MFC after: 1 month
MFC with: r345203, r345704, r345705
Relnotes: yes
Tested with: make tinderbox
Differential Revision: https://reviews.freebsd.org/D19732
Modified:
head/lib/clang/llvm.build.mk
head/lib/libc++/Makefile
head/lib/libc++experimental/Makefile
head/lib/libc++fs/Makefile
head/lib/libclang_rt/Makefile.inc
head/lib/libcxxrt/Makefile
head/lib/libgcc_eh/Makefile.inc
head/lib/libomp/Makefile
head/lib/ofed/libibnetdisc/Makefile
head/share/mk/bsd.sys.mk
head/share/mk/googletest.test.inc.mk
head/usr.bin/dtc/Makefile
head/usr.sbin/pmc/Makefile
Modified: head/lib/clang/llvm.build.mk
==============================================================================
--- head/lib/clang/llvm.build.mk Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/clang/llvm.build.mk Fri Mar 29 18:45:27 2019 (r345708)
@@ -95,7 +95,7 @@ CFLAGS+= -ffunction-sections
CFLAGS+= -fdata-sections
LDFLAGS+= -Wl,--gc-sections
-CXXFLAGS+= -std=c++11
+CXXSTD?= c++11
CXXFLAGS+= -fno-exceptions
CXXFLAGS+= -fno-rtti
CXXFLAGS.clang+= -stdlib=libc++
Modified: head/lib/libc++/Makefile
==============================================================================
--- head/lib/libc++/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libc++/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -76,9 +76,7 @@ CFLAGS+= -nostdinc++
CFLAGS+= -nostdlib
CFLAGS+= -D_LIBCPP_BUILDING_LIBRARY
CFLAGS+= -DLIBCXXRT
-.if empty(CXXFLAGS:M-std=*)
-CXXFLAGS+= -std=c++11
-.endif
+CXXSTD= c++11
LIBADD+= cxxrt
INCSGROUPS= STD EXP EXT
Modified: head/lib/libc++experimental/Makefile
==============================================================================
--- head/lib/libc++experimental/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libc++experimental/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -20,8 +20,6 @@ CXXFLAGS+= -nostdinc++
CXXFLAGS+= -nostdlib
CXXFLAGS+= -D_LIBCPP_BUILDING_LIBRARY
CXXFLAGS+= -DLIBCXXRT
-.if empty(CXXFLAGS:M-std=*)
-CXXFLAGS+= -std=c++14
-.endif
+CXXSTD= c++14
.include <bsd.lib.mk>
Modified: head/lib/libc++fs/Makefile
==============================================================================
--- head/lib/libc++fs/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libc++fs/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -22,8 +22,6 @@ CXXFLAGS+= -nostdinc++
CXXFLAGS+= -nostdlib
CXXFLAGS+= -D_LIBCPP_BUILDING_LIBRARY
CXXFLAGS+= -DLIBCXXRT
-.if empty(CXXFLAGS:M-std=*)
-CXXFLAGS+= -std=c++14
-.endif
+CXXSTD= c++14
.include <bsd.lib.mk>
Modified: head/lib/libclang_rt/Makefile.inc
==============================================================================
--- head/lib/libclang_rt/Makefile.inc Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libclang_rt/Makefile.inc Fri Mar 29 18:45:27 2019 (r345708)
@@ -41,4 +41,4 @@ CFLAGS+= -funwind-tables
CXXFLAGS+= -fvisibility-inlines-hidden
CXXFLAGS+= -fvisibility=hidden
CFLAGS+= -I${CRTSRC}/lib
-CXXFLAGS+= -std=c++11
+CXXSTD= c++11
Modified: head/lib/libcxxrt/Makefile
==============================================================================
--- head/lib/libcxxrt/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libcxxrt/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -22,9 +22,7 @@ SRCS+= libelftc_dem_gnu3.c\
WARNS= 0
CFLAGS+= -isystem ${SRCDIR} -nostdinc++
-.if empty(CXXFLAGS:M-std=*)
-CXXFLAGS+= -std=c++11
-.endif
+CXXSTD= c++11
VERSION_MAP= ${.CURDIR}/Version.map
.include <bsd.lib.mk>
Modified: head/lib/libgcc_eh/Makefile.inc
==============================================================================
--- head/lib/libgcc_eh/Makefile.inc Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libgcc_eh/Makefile.inc Fri Mar 29 18:45:27 2019 (r345708)
@@ -27,10 +27,8 @@ CXXFLAGS.${file}+= -fno-exceptions -funwind-tables
.endfor
CFLAGS+= -I${UNWINDINCDIR} -I${.CURDIR} -D_LIBUNWIND_IS_NATIVE_ONLY
-.if empty(CXXFLAGS:M-std=*)
-CXXFLAGS+= -std=c++11
-.endif
CXXFLAGS+= -fno-rtti
+CXXSTD= c++11
STATIC_CXXFLAGS+= -fvisibility=hidden -fPIC
# Probably need to just move this earlier or use CXXFLAGS
.if ${MK_DIRDEPS_BUILD} == "yes"
Modified: head/lib/libomp/Makefile
==============================================================================
--- head/lib/libomp/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/libomp/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -53,9 +53,9 @@ CFLAGS+= -I${ITTSRC}
CFLAGS+= -ffunction-sections
CFLAGS+= -fdata-sections
CXXFLAGS+= -fvisibility-inlines-hidden
-CXXFLAGS+= -std=c++11
CXXFLAGS+= -fno-exceptions
CXXFLAGS+= -fno-rtti
+CXXSTD= c++11
LDFLAGS+= -Wl,--warn-shared-textrel
LDFLAGS+= -Wl,--gc-sections
Modified: head/lib/ofed/libibnetdisc/Makefile
==============================================================================
--- head/lib/ofed/libibnetdisc/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/lib/ofed/libibnetdisc/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -31,9 +31,6 @@ LIBADD= osmcomp ibmad ibumad
CFLAGS+= -DHAVE_CONFIG_H=1
CFLAGS+= -I${_spath}
CFLAGS+= -I${SYSROOT:U${DESTDIR}}/${INCLUDEDIR}/infiniband
-.if ${COMPILER_FEATURES:Mc++11}
-CXXFLAGS+= -std=c++11
-.endif
VERSION_MAP= ${_spath}/libibnetdisc.map
.include <bsd.lib.mk>
Modified: head/share/mk/bsd.sys.mk
==============================================================================
--- head/share/mk/bsd.sys.mk Fri Mar 29 18:43:46 2019 (r345707)
+++ head/share/mk/bsd.sys.mk Fri Mar 29 18:45:27 2019 (r345708)
@@ -24,6 +24,19 @@ CFLAGS+= -std=iso9899:1999
.else # CSTD
CFLAGS+= -std=${CSTD}
.endif # CSTD
+
+.if ${COMPILER_FEATURES:Mc++11}
+CXXSTD?= c++11
+.elif ${COMPILER_TYPE} == "gcc"
+# Prior versions of g++ support C++98 with GNU extensions by default.
+CXXSTD?= gnu++98
+.else
+# Assume that the compiler supports at least C++98.
+CXXSTD?= c++98
+.endif
+CXXFLAGS+= -std=${CXXSTD}
+# CXXSTD
+
# -pedantic is problematic because it also imposes namespace restrictions
#CFLAGS+= -pedantic
.if defined(WARNS)
Modified: head/share/mk/googletest.test.inc.mk
==============================================================================
--- head/share/mk/googletest.test.inc.mk Fri Mar 29 18:43:46 2019 (r345707)
+++ head/share/mk/googletest.test.inc.mk Fri Mar 29 18:45:27 2019 (r345708)
@@ -1,13 +1,9 @@
# $FreeBSD$
-# XXX: this should be defined in bsd.sys.mk
-CXXSTD?= c++11
-
GTESTS_CXXFLAGS+= -DGTEST_HAS_POSIX_RE=1
GTESTS_CXXFLAGS+= -DGTEST_HAS_PTHREAD=1
GTESTS_CXXFLAGS+= -DGTEST_HAS_STREAM_REDIRECTION=1
GTESTS_CXXFLAGS+= -frtti
-GTESTS_CXXFLAGS+= -std=${CXXSTD}
# XXX: src.libnames.mk should handle adding this directory for libgtest's,
# libgmock's, etc, headers.
Modified: head/usr.bin/dtc/Makefile
==============================================================================
--- head/usr.bin/dtc/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/usr.bin/dtc/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -6,7 +6,7 @@ MAN= dtc.1
WARNS?= 3
-CXXFLAGS+= -std=c++11 -fno-rtti -fno-exceptions
+CXXFLAGS+= -fno-rtti -fno-exceptions
NO_SHARED?=NO
Modified: head/usr.sbin/pmc/Makefile
==============================================================================
--- head/usr.sbin/pmc/Makefile Fri Mar 29 18:43:46 2019 (r345707)
+++ head/usr.sbin/pmc/Makefile Fri Mar 29 18:45:27 2019 (r345708)
@@ -6,7 +6,8 @@
PROG_CXX= pmc
MAN=
WARNS?= 3
-CXXFLAGS+= -O0 -std=c++14
+CXXFLAGS+= -O0
+CXXSTD= c++14
CWARNFLAGS.gcc+= -Wno-redundant-decls
LIBADD= kvm pmc m ncursesw pmcstat elf
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