Add `nvm_clang_version` to ensure clang version > 3.5

nvm.sh

@@ -192,6 +192,10 @@ nvm_rc_version() {
   fi
 }
 
+nvm_clang_version() {
+  clang --version | command awk '{ if ($2 == "version") print $3; else if ($3 == "version") print $4 }' | command sed 's/-.*$//g'
+}
+
 nvm_version_greater() {
   command awk 'BEGIN {
     if (ARGV[1] == "" || ARGV[2] == "") exit(1)
@@ -1854,8 +1858,8 @@ nvm_install_source() {
   elif [ "${NVM_OS}" = 'aix' ]; then
     make='gmake'
   fi
-  if nvm_has "clang++" && nvm_has "clang" ; then
+  if nvm_has "clang++" && nvm_has "clang" && nvm_version_greater_than_or_equal_to nvm_clang_version 3.5 ; then
-    nvm_echo "Clang detected! Use Clang as c/c++ compiler!"
+    nvm_echo "Clang v3.5+ detected! Use Clang as c/c++ compiler!"
     MAKE_CXX='CC=clang CXX=clang++'
   fi
 
@@ -3145,7 +3149,7 @@ nvm() {
         nvm_is_iojs_version nvm_is_alias \
         nvm_ls_remote nvm_ls_remote_iojs nvm_ls_remote_index_tab \
         nvm_ls nvm_remote_version nvm_remote_versions \
-        nvm_install_binary \
+        nvm_install_binary nvm_clang_version \
         nvm_get_mirror nvm_get_download_slug nvm_download_artifact \
         nvm_install_source nvm_check_file_permissions \
         nvm_print_versions nvm_compute_checksum nvm_checksum \

test/fast/Unit tests/nvm_clang_version

@@ -0,0 +1,62 @@
+#!/bin/sh
+
+cleanup () {
+  unset -f die
+}
+
+die () { echo -e "$@" ; cleanup ;  exit 1; }
+
+if type "clang" > /dev/null 2>&1 ; then
+  clang_exec="$(type "clang")"
+  sudo rm -rf "${clang_exec}"
+fi
+if type "clang++" > /dev/null 2>&1 ; then
+  clangxx_exec="$(type "clang++")"
+  sudo rm -rf "${clangxx_exec}"
+fi
+
+NVM_ENV=testing \. ../../../nvm.sh
+
+clang() {
+  if [ "$1" = "--version" ]; then
+    echo "${VERSION_MESSAGE}"
+  fi
+}
+
+assert_version_is() {
+  if [ "${1}" != "${2}" ]; then
+    die "Expected ${2}, got ${1}, origin version message:\n${VERSION_MESSAGE}"
+    return 1
+  fi
+}
+
+CLANG_VERSION_ON_DEBIAN_JESSIE="Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
+Target: x86_64-pc-linux-gnu
+Thread model: posix"
+
+CLANG_VERSION_ON_UBUNTU_TRUSTY="Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
+Target: x86_64-pc-linux-gnu
+Thread model: posix"
+
+CLANG_VERSION_ON_ARCHLINUX="clang version 3.9.0 (tags/RELEASE_390/final)
+Target: x86_64-unknown-linux-gnu
+Thread model: posix
+InstalledDir: /usr/sbin"
+
+CLANG_VERSION_ON_FREEBSD="FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
+Target: x86_64-unknown-freebsd10.3
+Thread model: posix"
+
+VERSION_MESSAGE="${CLANG_VERSION_ON_DEBIAN_JESSIE}"
+assert_version_is "$(nvm_clang_version)" "3.5.0"
+
+VERSION_MESSAGE="${CLANG_VERSION_ON_UBUNTU_TRUSTY}"
+assert_version_is "$(nvm_clang_version)" "3.4"
+
+VERSION_MESSAGE="${CLANG_VERSION_ON_ARCHLINUX}"
+assert_version_is "$(nvm_clang_version)" "3.9.0"
+
+VERSION_MESSAGE="${CLANG_VERSION_ON_FREEBSD}"
+assert_version_is "$(nvm_clang_version)" "3.4.1"
+
+cleanup