https://sourceforge.net/p/resil/tickets/3/
--- lib/Makefile.am.orig	2009-03-25 13:30:42.000000000 -0500
+++ lib/Makefile.am	2013-11-02 23:31:11.000000000 -0500
@@ -41,9 +41,9 @@
 
 libIL_la_CPPFLAGS = -I $(il_include) -I $(all_include)
 libIL_la_CFLAGS = $(AM_CFLAGS) @IL_CFLAGS@
-libIL_la_CXXFLAGS = $(AM_CFLAGS) @IL_CFLAGS@
+libIL_la_CXXFLAGS = `echo $(AM_CFLAGS) | sed 's|-std=gnu99||'` @IL_CFLAGS@
 
-libIL_la_SOURCES = $(il_src)/il_alloc.c $(il_src)/il_doom.c $(il_src)/il_stack.c $(il_src)/il_pcx.c $(il_src)/il_rle.c $(il_src)/il_bits.c $(il_src)/il_endian.c $(il_src)/il_exr.cpp $(il_src)/il_jpeg.c $(il_src)/il_pic.c $(il_src)/il_sgi.c $(il_src)/il_bmp.c $(il_src)/il_error.c $(il_src)/il_lif.c $(il_src)/il_png.c $(il_src)/il_states.c $(il_src)/il_convbuff.c $(il_src)/il_files.c $(il_src)/il_main.c $(il_src)/il_pnm.c $(il_src)/il_targa.c $(il_src)/il_wdp.c $(il_src)/il_convert.c $(il_src)/il_gif.c $(il_src)/il_manip.c $(il_src)/il_profiles.c $(il_src)/il_tiff.c $(il_src)/il_cut.c $(il_src)/il_header.c $(il_src)/il_mdl.c $(il_src)/il_quantizer.c $(il_src)/il_utility.c $(il_src)/il_dcx.c $(il_src)/il_icon.c $(il_src)/il_mng.c $(il_src)/il_raw.c $(il_src)/il_wal.c $(il_src)/il_dds.c $(il_src)/il_internal.c $(il_src)/il_pal.c $(il_src)/il_rawdata.c $(il_src)/il_devil.c $(il_src)/il_io.c $(il_src)/il_pcd.c $(il_src)/il_register.c $(il_src)/il_psd.c $(il_src)/il_fastconv.c $(il_src)/il_neuquant.c $(il_src)/il_dds-save.c $(il_src)/il_psp.c $(il_src)/il_pix.c $(il_src)/il_pxr.c $(il_src)/il_vtf.c $(il_src)/il_xpm.c $(il_src)/il_hdr.c $(il_src)/il_icns.c $(il_src)/il_jp2.c $(il_src)/altivec_common.c $(il_src)/altivec_typeconversion.c $(il_src)/il_sun.c $(il_src)/il_nvidia.cpp $(il_src)/il_wbmp.c $(il_src)/il_squish.cpp $(il_src)/il_iff.c $(il_src)/il_ilbm.c $(il_src)/il_size.c $(il_src)/il_tpl.c $(il_src)/il_fits.c $(il_src)/il_iwi.c $(il_src)/il_blp.c $(il_src)/il_ftx.c $(il_src)/il_dicom.c $(il_src)/il_rot.c $(il_src)/il_texture.c $(il_src)/il_dpx.c $(il_src)/il_utx.cpp $(il_src)/il_mp3.c
+libIL_la_SOURCES = $(il_src)/il_alloc.c $(il_src)/il_doom.c $(il_src)/il_stack.c $(il_src)/il_pcx.c $(il_src)/il_rle.c $(il_src)/il_bits.c $(il_src)/il_endian.c $(il_src)/il_exr.cpp $(il_src)/il_jpeg.c $(il_src)/il_pic.c $(il_src)/il_sgi.c $(il_src)/il_bmp.c $(il_src)/il_error.c $(il_src)/il_lif.c $(il_src)/il_png.c $(il_src)/il_states.c $(il_src)/il_convbuff.c $(il_src)/il_files.c $(il_src)/il_main.c $(il_src)/il_pnm.c $(il_src)/il_targa.c $(il_src)/il_wdp.c $(il_src)/il_convert.c $(il_src)/il_gif.cpp $(il_src)/il_manip.c $(il_src)/il_profiles.c $(il_src)/il_tiff.c $(il_src)/il_cut.c $(il_src)/il_header.c $(il_src)/il_mdl.c $(il_src)/il_quantizer.c $(il_src)/il_utility.c $(il_src)/il_dcx.c $(il_src)/il_icon.c $(il_src)/il_mng.c $(il_src)/il_raw.c $(il_src)/il_wal.c $(il_src)/il_dds.c $(il_src)/il_internal.c $(il_src)/il_pal.c $(il_src)/il_rawdata.c $(il_src)/il_devil.c $(il_src)/il_io.c $(il_src)/il_pcd.c $(il_src)/il_register.c $(il_src)/il_psd.c $(il_src)/il_fastconv.c $(il_src)/il_neuquant.c $(il_src)/il_dds-save.c $(il_src)/il_psp.c $(il_src)/il_pix.c $(il_src)/il_pxr.c $(il_src)/il_vtf.c $(il_src)/il_xpm.c $(il_src)/il_hdr.c $(il_src)/il_icns.c $(il_src)/il_jp2.c $(il_src)/altivec_common.c $(il_src)/altivec_typeconversion.c $(il_src)/il_sun.c $(il_src)/il_nvidia.cpp $(il_src)/il_wbmp.c $(il_src)/il_squish.cpp $(il_src)/il_iff.c $(il_src)/il_ilbm.c $(il_src)/il_size.c $(il_src)/il_tpl.c $(il_src)/il_fits.c $(il_src)/il_iwi.c $(il_src)/il_blp.c $(il_src)/il_ftx.c $(il_src)/il_dicom.c $(il_src)/il_rot.c $(il_src)/il_texture.c $(il_src)/il_dpx.c $(il_src)/il_utx.cpp $(il_src)/il_mp3.c
 
 libIL_la_SOURCES += $(il_include)/altivec_common.h $(il_include)/altivec_typeconversion.h $(il_include)/il_alloc.h $(il_include)/il_bits.h $(il_include)/il_bmp.h $(il_include)/il_dcx.h $(il_include)/il_dds.h $(il_include)/il_doompal.h $(il_include)/il_dpx.h $(il_include)/il_endian.h $(il_include)/il_exr.h $(il_include)/il_files.h $(il_include)/il_gif.h $(il_include)/il_hdr.h $(il_include)/il_icns.h $(il_include)/il_icon.h $(il_include)/il_internal.h $(il_include)/il_jp2.h $(il_include)/il_jpeg.h $(il_include)/il_lif.h $(il_include)/il_manip.h $(il_include)/il_mdl.h $(il_include)/il_pal.h $(il_include)/il_pcx.h $(il_include)/il_pic.h $(il_include)/il_pnm.h $(il_include)/il_psd.h $(il_include)/il_psp.h $(il_include)/il_q2pal.h $(il_include)/il_register.h $(il_include)/il_rle.h $(il_include)/il_sgi.h $(il_include)/il_stack.h $(il_include)/il_states.h $(il_include)/il_targa.h $(il_include)/il_utx.h $(il_include)/il_vtf.h $(il_include)/il_wdp.h $(all_include)/IL/devil_internal_exports.h
 libIL_la_LDFLAGS = @IL_LIBS@ $(AM_LDFLAGS)