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configure: check for clang

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Try clang as the C compiler before cc and use the same -W* CFLAGS as
with gcc.
This commit is contained in:
Miroslav Lichvar
2017-04-05 13:10:40 +02:00
parent 935d855b47
commit c103bebd9f
1 changed files with 8 additions and 6 deletions
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14
configure vendored
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@@ -490,14 +490,16 @@ MYCPPFLAGS="$CPPFLAGS"
MYLDFLAGS="$LDFLAGS"
if [ "x$MYCC" = "x" ]; then
MYCC=gcc
if ! test_code "$MYCC" '' '' '' ''; then
MYCC=cc
if ! test_code "$MYCC" '' '' '' ''; then
for cc in gcc clang cc ""; do
if [ "x$cc" = "x" ]; then
echo "error: no C compiler found"
exit 1
fi
fi
MYCC=$cc
if test_code "$MYCC" '' '' '' ''; then
break
fi
done
else
if ! test_code "$MYCC" '' '' '' ''; then
echo "error: C compiler $MYCC cannot create executables"
@@ -509,7 +511,7 @@ if [ "x$MYCFLAGS" = "x" ]; then
MYCFLAGS="-O2 -g"
fi
if [ "x$MYCC" = "xgcc" ]; then
if [ "x$MYCC" = "xgcc" ] || [ "x$MYCC" = "xclang" ]; then
MYCFLAGS="$MYCFLAGS -Wmissing-prototypes -Wall"
fi