build: Improve SECP_TRY_APPEND_DEFAULT_CFLAGS
macro
Co-authored-by: Tim Ruffing <crypto@timruffing.de>
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11
configure.ac
11
configure.ac
@ -88,11 +88,14 @@ esac
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AC_DEFUN([SECP_TRY_APPEND_DEFAULT_CFLAGS], [
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AC_DEFUN([SECP_TRY_APPEND_DEFAULT_CFLAGS], [
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# GCC and compatible (incl. clang)
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# GCC and compatible (incl. clang)
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if test "x$GCC" = "xyes"; then
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if test "x$GCC" = "xyes"; then
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# Try to append -Werror=unknown-warning-option to CFLAGS temporarily. Otherwise clang will
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# Try to append -Werror to CFLAGS temporarily. Otherwise checks for some unsupported
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# not error out if it gets unknown warning flags and the checks here will always succeed
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# flags will succeed.
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# no matter if clang knows the flag or not.
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# Note that failure to append -Werror does not necessarily mean that -Werror is not
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# supported. The compiler may already be warning about something unrelated, for example
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# about some path issue. If that is the case, -Werror cannot be used because all
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# of those warnings would be turned into errors.
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SECP_TRY_APPEND_DEFAULT_CFLAGS_saved_CFLAGS="$CFLAGS"
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SECP_TRY_APPEND_DEFAULT_CFLAGS_saved_CFLAGS="$CFLAGS"
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SECP_TRY_APPEND_CFLAGS([-Werror=unknown-warning-option], CFLAGS)
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SECP_TRY_APPEND_CFLAGS([-Werror], CFLAGS)
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SECP_TRY_APPEND_CFLAGS([-std=c89 -pedantic -Wno-long-long -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef], $1) # GCC >= 3.0, -Wlong-long is implied by -pedantic.
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SECP_TRY_APPEND_CFLAGS([-std=c89 -pedantic -Wno-long-long -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef], $1) # GCC >= 3.0, -Wlong-long is implied by -pedantic.
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SECP_TRY_APPEND_CFLAGS([-Wno-overlength-strings], $1) # GCC >= 4.2, -Woverlength-strings is implied by -pedantic.
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SECP_TRY_APPEND_CFLAGS([-Wno-overlength-strings], $1) # GCC >= 4.2, -Woverlength-strings is implied by -pedantic.
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