we've had enough ricer bugs for a while...

this profile.bashrc filters out any flag that isn't recognized by the compiler (will make the -fPIC configure test fail) and spit out a warning. also spit out warnings for the flags that should never get set by the user (-m32, -fPIC, -fvisibility=hidden to name a few)

1 files changed, 65 insertions, 0 deletions

diff --git a/profiles/default-linux/amd64/profile.bashrc b/profiles/default-linux/amd64/profile.bashrc
new file mode 100644
index 000000000000..d67aee64b2e8
--- /dev/null
+++ b/profiles/default-linux/amd64/profile.bashrc
@@ -0,0 +1,65 @@
+getPROG() {
+    local var=$1
+    local 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}"
+}
+
+hasme() {
+	local x
+
+	local me=$1
+	shift
+	for x in "$@"; do
+		if [ "${x}" == "${me}" ]; then
+		return 0
+	fi
+	done
+	return 1
+}
+
+test_broken_flags() {
+	local mygcc=${1}
+	shift
+	echo 'main(){}' | ${mygcc} ${@} -E - 2>&1 | egrep "unrecognized .*option" \
+		| egrep -o -- '('\''|\"|`)-.*' | sed -r 's/('\''|`|")//g'
+}
+
+if [[ ${EBUILD_PHASE} == "setup" ]]; then
+	trigger=0
+	for flag in ${CFLAGS} ; do
+		 broken_flag=$(test_broken_flags $(getPROG CC gcc) ${flag})
+		 if [[ -n ${broken_flag} ]]; then
+		 	ewarn "Filtering out the non-existing CFLAG \"${broken_flag}\""
+			CFLAGS=${CFLAGS//${broken_flag}}
+		fi
+	done
+	for flag in ${CXXFLAGS} ; do
+		broken_flag=$(test_broken_flags $(getPROG CXX g++) ${flag})
+		if [[ -n ${broken_flag} ]]; then
+			ewarn "Filtering out the non-existing CXXFLAG \"${broken_flag}\"" 
+			CXXFLAGS=${CXXFLAGS//${broken_flag}}
+		fi
+	done
+	for flag in "-fvisibility=hidden" "-fvisibility-hidden" "-fvisibility-inline-hidden" "-fPIC" "-fweb" "-m32" "-m64" "-g3" "-ggdb3" ; do
+		hasme ${flag} ${CFLAGS} ${CXXFLAGS} && trigger=1 && \
+		ewarn "Your C(XX)FLAGS contain(s) \"${flag}\" which can break packages."
+	done
+	if [[ ${trigger} -ge 1 ]]; then
+		ewarn ""
+		ewarn "Before you file a bug please remove these flags and "
+		ewarn "re-compile the package in question as well as all its dependencies"
+	fi
+fi
+unset trigger broken_flag