Just use old glm for LO, the rest of LO is not keen on using C++ git add -A 1

pkgs/applications/office/libreoffice/default.nix

@@ -104,8 +104,6 @@ stdenv.mkDerivation rec {
   # to make its dlopen work.
   NIX_LDFLAGS = "-lcups";
 
-  NIX_CFLAGS_COMPILE="-std=c++11"; # glm 0.9.6.0 insists on this
-
   # If we call 'configure', 'make' will then call configure again without parameters.
   # It's their system.
   configureScript = "./autogen.sh";

pkgs/development/libraries/glm/0954.nix

@@ -0,0 +1,35 @@
+{ stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation rec {
+  name = "glm-0.9.5.4";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/project/ogl-math/${name}/${name}.zip";
+    sha256 = "0v14xssysy3q1h2mga6rqlz722mwbis4rrx76zmvhjqh17qh4l62";
+  };
+
+  buildInputs = [ unzip ];
+
+  outputs = [ "out" "doc" ];
+
+  installPhase = ''
+    mkdir -p "$out/include"
+    cp -r glm "$out/include"
+
+    mkdir -p "$doc/share/doc/glm"
+    cp -r doc/* "$doc/share/doc/glm"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "OpenGL Mathematics library for C++";
+    longDescription = ''
+      OpenGL Mathematics (GLM) is a header only C++ mathematics library for
+      graphics software based on the OpenGL Shading Language (GLSL)
+      specification and released under the MIT license.
+    '';
+    homepage = http://glm.g-truc.net/;
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = with stdenv.lib.maintainers; [ fuuzetsu ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -5285,6 +5285,7 @@ let
   };
 
   glm = callPackage ../development/libraries/glm { };
+  glm_0954 = callPackage ../development/libraries/glm/0954.nix { };
 
   glog = callPackage ../development/libraries/glog { };
 
@@ -10063,6 +10064,7 @@ let
     zip = zip.override { enableNLS = false; };
     jdk = openjdk;
     boost = boost155;
+    glm = glm_0954;
     fontsConf = makeFontsConf {
       fontDirectories = [
         freefont_ttf xorg.fontmiscmisc xorg.fontbhttf