1 files changed, 93 insertions, 0 deletions
diff --git a/profiles/arch/amd64/profile.bashrc b/profiles/arch/amd64/profile.bashrc
new file mode 100644
index 00000000..e30b428e
--- /dev/null
+++ b/profiles/arch/amd64/profile.bashrc
@@ -0,0 +1,93 @@
+BAD_FLAGS=( "-fvisibility=hidden" "-fvisibility-hidden" "-fvisibility-inlines-hidden" "-fPIC" "-fpic" "-m32" "-m64" "-g3" "-ggdb3" "-ffast-math" )
+
+getPROG() {
+	local var=$1 prog=$2
+
+	if [[ -n ${!var} ]] ; then
+		echo "${!var}"
+		return 0
+	fi
+
+	local search=
+	[[ -n $3 ]] && search=$(type -p "$3-${prog}")
+	[[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
+	[[ -n ${search} ]] && prog=${search##*/}
+
+	export ${var}=${prog}
+	echo "${!var}"
+}
+
+get_broken_flags() {
+	local myprog="${1}" lang="${2}"
+	shift 2
+
+	# this finds general broken flags, such as -02 or bogus -f flags
+	echo 'main(){}' | LC_ALL=C ${myprog} ${@} -x ${lang} -o /dev/null - 2>&1 | \
+		egrep "unrecognized .*option" | \
+		egrep -o -- '('\''|\"|`)-.*' | \
+		sed -r 's/('\''|`|")//g; s/^/"/; s/$/"/'
+	
+	# this will find bogus debug output types, such as -gfoobar
+	echo 'main(){}' | LC_ALL=C ${myprog} ${@} -x ${lang} -o /dev/null - 2>&1 | \
+		egrep "unrecognised debug output" | \
+		egrep -o -- '('\''|\"|`).*' | \
+		sed -r 's/('\''|`|")//g; s/^/"-g/; s/$/"/'
+}
+
+remove_flag() {
+	local remove="${1}"
+	shift
+
+	while [[ "${1}" ]]; do
+		[[ "${1}" != "${remove}" ]] && echo -n "${1} "
+		shift
+	done
+}
+
+filter_invalid_flags() {
+	local flag broken_flags
+
+	eval broken_flags=( $(get_broken_flags $(getPROG CC gcc) c ${CFLAGS}) )
+	for flag in "${broken_flags[@]}"; do
+		ewarn "Filtering out invalid CFLAG \"${flag}\""
+		CFLAGS="$(remove_flag "${flag}" ${CFLAGS})"
+	done
+
+	eval broken_flags=( $(get_broken_flags $(getPROG CXX g++) c++ ${CXXFLAGS}) )
+	for flag in "${broken_flags[@]}"; do
+		ewarn "Filtering out invalid CXXFLAG \"${flag}\""
+		CXXFLAGS="$(remove_flag "${flag}" ${CXXFLAGS})"
+	done
+}
+
+bashrc_has() {
+	[[ " ${*:2} " == *" $1 "* ]]
+}
+
+if [[ ${EBUILD_PHASE} == "setup" ]]; then
+
+	filter_invalid_flags
+	
+	unset trigger
+
+	for flag in "${BAD_FLAGS[@]}"; do
+		if bashrc_has ${flag} ${CFLAGS}; then
+			trigger=1
+			eerror "Your CFLAGS contains \"${flag}\" which can break packages."
+		fi
+		if bashrc_has ${flag} ${CXXFLAGS}; then
+			trigger=1
+			eerror "Your CXXFLAGS contains \"${flag}\" which can break packages."
+		fi
+	done
+	if [[ ${trigger} ]]; then
+		eerror ""
+		eerror "Before you file a bug, please remove these flags and "
+		eerror "re-compile the package in question as well as all its dependencies"
+		sleep 5
+	fi
+
+	unset flag trigger
+fi
+
+unset BAD_FLAGS