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builder: pass `-std=gnu99` to the C backend under linux (#12236)

pull/12241/head
Lance Fredrickson 2021-10-20 05:26:25 -06:00 committed by GitHub
parent 3e52d54586
commit 7c1fff3495
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3 changed files with 7 additions and 3 deletions
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2
cmd/v/help/build-c.txt
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@ -243,7 +243,7 @@ see also `v help build`.
compiler, on the command line, without writing an .rsp file first. compiler, on the command line, without writing an .rsp file first.
-no-std -no-std
By default, V passes -std=c99 to the C backend, but some compilers do By default, V passes -std=gnu99(linux)/-std=c99 to the C backend, but some compilers do
not support that, even though they may be able to compile the produced not support that, even though they may be able to compile the produced
code, or have other options that can be tuned to allow it. code, or have other options that can be tuned to allow it.
Passing -no-std will remove that flag, and you can then use -cflags '' Passing -no-std will remove that flag, and you can then use -cflags ''

6
vlib/v/builder/cc.v
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@ -162,7 +162,11 @@ fn (mut v Builder) setup_ccompiler_options(ccompiler string) {
// arguments for the C compiler // arguments for the C compiler
ccoptions.args = [v.pref.cflags] ccoptions.args = [v.pref.cflags]
if !v.pref.no_std { if !v.pref.no_std {
ccoptions.args << '-std=c99 -D_DEFAULT_SOURCE' if v.pref.os == .linux {
ccoptions.args << '-std=gnu99 -D_DEFAULT_SOURCE'
} else {
ccoptions.args << '-std=c99 -D_DEFAULT_SOURCE'
}
} }
ccoptions.wargs = [ ccoptions.wargs = [
'-Wall', '-Wall',

2
vlib/v/pref/pref.v
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@ -176,7 +176,7 @@ pub mut:
fatal_errors bool // unconditionally exit after the first error with exit(1) fatal_errors bool // unconditionally exit after the first error with exit(1)
reuse_tmpc bool // do not use random names for .tmp.c and .tmp.c.rsp files, and do not remove them reuse_tmpc bool // do not use random names for .tmp.c and .tmp.c.rsp files, and do not remove them
no_rsp bool // when true, pass C backend options directly on the CLI (do not use `.rsp` files for them, some older C compilers do not support them) no_rsp bool // when true, pass C backend options directly on the CLI (do not use `.rsp` files for them, some older C compilers do not support them)
no_std bool // when true, do not pass -std=c99 to the C backend no_std bool // when true, do not pass -std=gnu99(linux)/-std=c99 to the C backend
use_color ColorOutput // whether the warnings/errors should use ANSI color escapes. use_color ColorOutput // whether the warnings/errors should use ANSI color escapes.
no_parallel bool no_parallel bool
is_vweb bool // skip _ var warning in templates is_vweb bool // skip _ var warning in templates