musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2020年06月01日 20:53:42 -0400
committer	Rich Felker <dalias@aerifal.cx>	2020年06月01日 20:59:53 -0400
commit	c40157d87ef0b585a90ff5230fdf69cddc824d7f (patch)
tree	e4569c082284d1cfa4b32f92696cc8fd2f700f2f
parent	8d81ba8c0bc6fe31136cb15c9c82ef4c24965040 (diff)
download	musl-c40157d87ef0b585a90ff5230fdf69cddc824d7f.tar.gz

suppress unwanted warnings when configuring with clang

coding style warnings enabled by default in clang have long been a source of spurious questions/bug-reports. since clang provides a -w that behaves differently from gcc's, and that lets us enable any warnings we may actually want after turning them all off to start with a clean slate, use it at configure time if clang is detected.

Diffstat

-rwxr-xr-x

configure

1 files changed, 7 insertions, 0 deletions

diff --git a/configure b/configure
index a2728969..43598825 100755
--- a/configure
+++ b/configure

@@ -495,6 +495,13 @@ fnmatch '-mtune=*|*\ -mtune=*' "$CC $CFLAGS" || tryldflag CFLAGS_AUTO -mtune=gen

+# GCC defines -w as overriding any -W options, regardless of order, but

+# clang has a bunch of annoying warnings enabled by default and needs -w

+# to start from a clean slate. So use -w if building with clang.

+test "$cc_family" = clang && tryflag CFLAGS_AUTO -w

# Even with -std=c99, gcc accepts some constructs which are constraint

# violations. We want to treat these as errors regardless of whether

# other purely stylistic warnings are enabled -- especially implicit

generated by cgit v1.2.1 (git 2.18.0) at 2025年10月08日 15:57:48 +0000