As discussed on arch@, gcc 4.2.1 is on its way out. Turn off Werror on gcc
versions < 5.0 permantly. This will allow older platforms to continue to compile
w/o new errors once we take them out of universe by default. This will also free
developers from chasing down obsolete warnings that produce no beneficial
changes to the source.
Discussed on: arch@
Reviewed by: jhb@, emaste@, pfg@
Differential Revision: https://reviews.freebsd.org/D21378
It is part of -Wformat, which is enabled by -Wall. Empty format strings are
well defined and it is perfectly reasonable to expect them in a formatting
interface.
Some warning flags are valid for C++ but not C. GCC 8 complains if you pass
such flags when building a C file. Using a separate variable for these
flags allows building both C and C++ files in the same directory (such as
the fusefs tests) under GCC.
Reviewed by: cem, emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21116
r345708 worked for the base system, but unfortunately, caused a lot of
disruption for third-party packages that relied on C++, since bsd.sys.mk is
used by applications outside the base system. The defaults picked didn't match
the compiler's defaults and broke some builds that didn't specify a standard,
as well as some that overrode the value by setting `-std=gnu++14` (for
example) manually.
This change takes a more relaxed approach to appending `-std=${CXXSTD}` to
CXXFLAGS, by only doing so when the value is specified, as opposed to
overriding the standard set by an end-user. This avoids the need for having
to bake NOP default into bsd.sys.mk for supported compiler-toolchain
versions.
In order to make this change possible, add CXXSTD to Makefile snippets which
relied on the default value (c++11) added in r345708.
MFC after: 2 weeks
MFC with: r345708, r346574
Reviewed by: emaste
Reported by: jbeich
Differential Revision: https://reviews.freebsd.org/D19895 (as part of a larger change)
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
When a review is closed via Phabricator it updates the patch attached to the
review. I downloaded the raw patch from Phabricator, applied it, and repeated
my mistake from r345704 by accident mixing content from D19732 and D19738.
For my own personal sanity, I will try not to mix reviews like this in the
future.
MFC after: 1 month
MFC with: r345706
Approved by: emaste (mentor, implicit)
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
I accidentally committed code from two reviews. I will reintroduce the code to
bsd.progs.mk as part of a separate commit from r345704.
Approved by: emaste (mentor, implicit)
MFC after: 2 months
MFC with: r345704
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
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D19732
large atomic operation may incur significant performance penalty" ) for
arm before armv6. Since on these older architectures atomic operations
are always translated to libcalls, and this is expected, the warning is
not really useful there.
dirdeps.mk and meta.autodep.mk will now look for
Makefile.depend.options
to handle optional dependencies, the work is all done by
dirdeps-options.mk
Also update to latest meta.stage.mk and gendirdeps.mk
Reviewed by: bdrewery
Differential Revision: https://reviews.freebsd.org/D15701
r332090 added a LINKER_TYPE test to add the --no-rosegment flag when
linking the i386 loader components with lld. Instead, introduce a
general mechanism for setting LDFLAGS for a specific linker type,
and use it for --no-rosegment.
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14998
new clang 6.0.0 -Wtautological-constant-compare warning to the WARNS <=
6 level. (This warning is still being worked on upstream to reduce
false positives, but it is currently still too trigger happy.)
This warning checks whether a constant is out of range of the integer
type. An example is `comparison of 'u_int' > 4294967295 is always false`
and in this case the warning makes sense.
However, when the type is a typedef that can be either 64 or 32 bits the
if condition is only tautological in some configurations so this should
not be a warning that fails the build.
Reviewed by: dim
Approved by: jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D12912
This effectively reverts r304877, after having relegated the warning
suppression to the zic(8) makefile in r323572.
Reviewed by: emaste
Sponsored by: Dell EMC Isilon
X-Differential Revision: https://reviews.freebsd.org/D12284
- Include debug symbols in static libraries. This permits binaries
to include debug symbols for functions obtained from static libraries.
- Permit the C/C++ compiler flags added for MK_DEBUG_FILES to be
overridden by setting DEBUG_FILES_CFLAGS. Use this to limit the debug
information for llvm libraries and binaries.
Reviewed by: emaste
Sponsored by: DARPA / AFRL
Differential Revision: https://reviews.freebsd.org/D12025
This allows 'make foo install' or 'make all install'. It is a similar
fix as r304697 did for reading dependency files.
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
The C++ header files must be searched before /usr/include.
The original code in Makefile.inc1 did this before the change in r297271 to
use -isystem. The libc++ import in r300770 fixed the bug introduced in
r297271 by swapping XCFLAGS and XCXXFLAGS ordering in CROSSENV.
Moving the code from Makefile.inc1 to bsd.sys.mk in r300886 also made it
more difficult to control the order of the flags. CXXFLAGS is based on
CFLAGS, so any additions to it will come after CFLAGS. The CROSSENV
code from Makefile.inc1 was such that it was ensured the CXXFLAGS came
first by setting them directly in CXX. Using CXXFLAGS+=-I would work
here, but instead continue to use -isystem by adding it to CXX so it
comes before CFLAGS.
Reported by: dim
This allows respecting -nostdinc, -nostdinc++ and -nostdlib before
making the decision to add in -isystem, etc. The -isystem flags
are problematic for building lib/libc++ and lib/libcxxrt which wants
to only use its own headers.
More information the need of these flags can be found at
https://gcc.gnu.org/ml/gcc/2016-03/msg00219.html
This also reverts r300873.
Sponsored by: EMC / Isilon Storage Division
This is limited to src-tree builds, meaning not extended to ports or other
out-of-tree builds.
This will help ensure that read-only OBJDIRS will be respected at install-time
by causing a more consistent failure for those who don't use a read-only
OBJDIR. It also will cause Jenkins to yell. This is a better solution than
trying to see CC=false as has been attempted and discussed before.
Of course this is only relevant for files generated by CC.
Disable this for META_MODE since it will detect the CFLAGS/command
change and force a rebuild.
Sponsored by: EMC / Isilon Storage Division
This will only be done if the target is defined, so if the target is
defined after bsd.sys.mk is included then it needs to manually add
${META_DEPS} still.
Sponsored by: EMC / Isilon Storage Division
This overrides the cross-compiler's default sysroot to use the WORLD32's
sysroot for building the lib32 libraries. Previously the cross-compiler
would default the sysroot to the 64bit WORLDTMP and -B/-L/-isystem flags
were used to build using the lib32 files. This leads to multiple issues
discussed later. Some extra headers are now needed to be staged since the
64bit WORLDTMP is not referenced at all for headers. The 64bit WORLDTMP
is still used via PATH for build tools. Overriding the default
target/arch is retained in the CC/CXX overrides.
This allows reverting the LDSCRIPT rewriting in installworld from r296921 and
r235122, thus allowing read-only objdirs to work for installing again.
This removes the need for _LDSCRIPTROOT.
This allows progressing the change to always use --sysroot for the build
rather than only relying on the cross-compiler's default sysroot. The
work for that is in D3970 and needed to resolve WITHOUT_CROSS_COMPILER
not using a --sysroot [1].
PR: 196193 [1]
Sponsored by: EMC / Isilon Storage Division
