diff --git a/compat/tms470/math.h b/compat/tms470/math.h
new file mode 100644
index 0000000000..1104d744e7
--- /dev/null
+++ b/compat/tms470/math.h
@@ -0,0 +1,7 @@
+#include_next <math.h>
+
+#undef INFINITY
+#undef NAN
+
+#define INFINITY (*(const float*)((const unsigned []){ 0x7f800000 }))
+#define NAN      (*(const float*)((const unsigned []){ 0x7fc00000 }))
diff --git a/configure b/configure
index 36c88e2626..eead2d66be 100755
--- a/configure
+++ b/configure
@@ -2568,11 +2568,8 @@ probe_cc(){
         _type=tms470
         _ident=$($_cc -version | head -n1 | tr -s ' ')
         _flags='--gcc --abi=eabi -me'
-        _cflags='-D__gnuc_va_list=va_list -D__USER_LABEL_PREFIX__='
         _cc_e='-ppl -fe=$@'
         _cc_o='-fe=$@'
-        as_default="${cross_prefix}gcc"
-        ld_default="${cross_prefix}gcc"
         _depflags='-ppa -ppd=$(@:.o=.d)'
         _cflags_speed='-O3 -mf=5'
         _cflags_size='-O3 -mf=2'
@@ -3234,6 +3231,16 @@ fi
 
 test -n "$libc_type" && enable $libc_type
 
+# hacks for compiler/libc/os combinations
+
+if enabled_all tms470 glibc; then
+    CPPFLAGS="-I${source_path}/compat/tms470 ${CPPFLAGS}"
+    add_cppflags -D__USER_LABEL_PREFIX__=
+    add_cppflags -D__builtin_memset=memset
+    add_cppflags -D__gnuc_va_list=va_list -D_VA_LIST_DEFINED
+    add_cflags   -pds=48    # incompatible redefinition of macro
+fi
+
 esc(){
     echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
 }
diff --git a/libavcodec/bmpenc.c b/libavcodec/bmpenc.c
index fc3602868f..bda679903c 100644
--- a/libavcodec/bmpenc.c
+++ b/libavcodec/bmpenc.c
@@ -99,7 +99,7 @@ static int bmp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     case AV_PIX_FMT_BGR4_BYTE:
     case AV_PIX_FMT_GRAY8:
         av_assert1(bit_count == 8);
-        ff_set_systematic_pal2(palette256, avctx->pix_fmt);
+        avpriv_set_systematic_pal2(palette256, avctx->pix_fmt);
         pal = palette256;
         break;
     case AV_PIX_FMT_PAL8:
diff --git a/libavcodec/pcxenc.c b/libavcodec/pcxenc.c
index 7f710a2c12..7cb3af3243 100644
--- a/libavcodec/pcxenc.c
+++ b/libavcodec/pcxenc.c
@@ -131,7 +131,7 @@ static int pcx_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     case AV_PIX_FMT_GRAY8:
         bpp = 8;
         nplanes = 1;
-        ff_set_systematic_pal2(palette256, avctx->pix_fmt);
+        avpriv_set_systematic_pal2(palette256, avctx->pix_fmt);
         pal = palette256;
         break;
     case AV_PIX_FMT_PAL8:
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index d426f437f5..3496bb0ce0 100644
--- a/libavcodec/rawdec.c
+++ b/libavcodec/rawdec.c
@@ -108,7 +108,7 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
         return AVERROR(EINVAL);
     }
 
-    ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
+    avpriv_set_systematic_pal2(context->palette, avctx->pix_fmt);
     if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
        avctx->pix_fmt==AV_PIX_FMT_PAL8 &&
        (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index ae748b5f37..d64de0e467 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -544,7 +544,7 @@ static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
             buf->linesize[i] = 0;
         }
         if (size[1] && !size[2])
-            ff_set_systematic_pal2((uint32_t *)buf->data[1], s->pix_fmt);
+            avpriv_set_systematic_pal2((uint32_t *)buf->data[1], s->pix_fmt);
         buf->width   = s->width;
         buf->height  = s->height;
         buf->pix_fmt = s->pix_fmt;
diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
index bc7f20c3d7..c42f9f20aa 100644
--- a/libavfilter/vf_scale.c
+++ b/libavfilter/vf_scale.c
@@ -320,7 +320,7 @@ static int start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
     outpicref->video->h = outlink->h;
 
     if(scale->output_is_pal)
-        ff_set_systematic_pal2((uint32_t*)outpicref->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
+        avpriv_set_systematic_pal2((uint32_t*)outpicref->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
 
     av_reduce(&outpicref->video->sample_aspect_ratio.num, &outpicref->video->sample_aspect_ratio.den,
               (int64_t)picref->video->sample_aspect_ratio.num * outlink->h * link->w,
diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index e4460d3cea..0cff34123c 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -146,7 +146,7 @@ int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int hei
     return total_size;
 }
 
-int ff_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
+int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
 {
     int i;
 
@@ -214,7 +214,7 @@ int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
         return ret;
     }
     if (desc->flags & PIX_FMT_PAL || desc->flags & PIX_FMT_PSEUDOPAL)
-        ff_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
+        avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
 
     return ret;
 }
diff --git a/libavutil/imgutils.h b/libavutil/imgutils.h
index f10000cdc8..a9317a71e1 100644
--- a/libavutil/imgutils.h
+++ b/libavutil/imgutils.h
@@ -187,7 +187,7 @@ int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
  */
 int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
 
-int ff_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
+int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
 
 /**
  * @}