firefox fails to build on netbsd-8 amd64

[Greg Troxel <gdt%lexort.com@localhost>]

pkgsrc-current, ~everything else up to date

(The good news is that my list of troubled packages is small.)


running: "/tmp/work/www/firefox/work/.cwrapper/bin/gcc" "-O2" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-O2" "-D_GLIBCXX_INCLUDE_NEXT_C_HEADERS" "-D_FORTIFY_SOURCE=2" "-I/usr/pkg/include" "-I/usr/include" "-I/usr/pkg/include/nspr" "-I/usr/pkg/include/nss/nss" "-I/usr/X11R7/include" "-I/usr/X11R7/include/libdrm" "-I/usr/pkg/include/glib-2.0" "-I/usr/pkg/include/gio-unix-2.0" "-I/usr/pkg/lib/glib-2.0/include" "-I/usr/pkg/include/ffmpeg4" "-I/usr/pkg/include/freetype2" "-I" "glsl-optimizer/include" "-I" "glsl-optimizer/src/mesa" "-I" "glsl-optimizer/src/mapi" "-I" "glsl-optimizer/src/compiler" "-I" "glsl-optimizer/src/compiler/glsl" "-I" "glsl-optimizer/src/gallium/auxiliary" "-I" "glsl-optimizer/src/gallium/include" "-I" "glsl-optimizer/src" "-I" "glsl-optimizer/src/util" "-D__STDC_FORMAT_MACROS" "-DHAVE_PTHREAD" "-DHAVE_TIMESPEC_GET" "-o" "/tmp/work/www/firefox/work/build/release/build/glslopt-46a925399a15ea01/out/glsl-optimizer/src/mesa/main/imports.o" "-c" "glsl-optimizer/src/mesa/main/imports.c"
cargo:warning=In file included from glsl-optimizer/src/mesa/main/imports.c:49:
cargo:warning=glsl-optimizer/src/mesa/main/context.h:336:37: error: use of undeclared identifier 'GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR'
cargo:warning=   return ctx->Const.ContextFlags & GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
cargo:warning=                                    ^
cargo:warning=1 error generated.
exit code: 1

--- stderr