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Turn on -Wimplicit-fallthrough by default if available
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
parent
5662433c38
commit
4331769c0f
@ -888,7 +888,7 @@ host-test-program-cmd = $(host-built-program-cmd)
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endif
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# Extra flags to pass to GCC.
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+gccwarn := -Wall -Wwrite-strings -Wundef
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+gccwarn := -Wall -Wwrite-strings -Wundef $(cc-option-wimplicit-fallthrough)
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ifeq ($(enable-werror),yes)
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+gccwarn += -Werror
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endif
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26
configure
vendored
26
configure
vendored
@ -7465,6 +7465,32 @@ if test $libc_cv_cc_loop_to_function = yes; then
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -Wimplicit-fallthrough" >&5
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printf %s "checking for -Wimplicit-fallthrough... " >&6; }
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if test ${libc_cv_cc_wimplicit_fallthrough+y}
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then :
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printf %s "(cached) " >&6
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else case e in #(
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e) if { ac_try='${CC-cc} -Werror -Wimplicit-fallthrough -xc /dev/null -S -o /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then :
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libc_cv_cc_wimplicit_fallthrough=-Wimplicit-fallthrough
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else case e in #(
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e) libc_cv_cc_wimplicit_fallthrough= ;;
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esac
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fi
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;;
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esac
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fi
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_wimplicit_fallthrough" >&5
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printf "%s\n" "$libc_cv_cc_wimplicit_fallthrough" >&6; }
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config_vars="$config_vars
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cc-option-wimplicit-fallthrough = $libc_cv_cc_wimplicit_fallthrough"
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libgd" >&5
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printf %s "checking for libgd... " >&6; }
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if test "$with_gd" != "no"; then
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@ -1468,6 +1468,15 @@ if test $libc_cv_cc_loop_to_function = yes; then
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fi
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AC_SUBST(libc_cv_cc_loop_to_function)
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AC_CACHE_CHECK([for -Wimplicit-fallthrough],
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libc_cv_cc_wimplicit_fallthrough, [dnl
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LIBC_TRY_CC_OPTION([-Werror -Wimplicit-fallthrough],
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[libc_cv_cc_wimplicit_fallthrough=-Wimplicit-fallthrough],
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[libc_cv_cc_wimplicit_fallthrough=])
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])
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LIBC_CONFIG_VAR([cc-option-wimplicit-fallthrough],
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[$libc_cv_cc_wimplicit_fallthrough])
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dnl Check whether we have the gd library available.
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AC_MSG_CHECKING(for libgd)
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if test "$with_gd" != "no"; then
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