[FFmpeg-cvslog] configure: Move x86 assembler sanity check into assembler probe function

[Diego Biurrun]

ffmpeg | branch: master | Diego Biurrun <diego at biurrun.de> | Mon May 22 12:48:15 2017 +0000| [5cae5a1defa360da076365a786093a749d1ddf4e] | committer: James Almer

configure: Move x86 assembler sanity check into assembler probe function

This allows for more graceful fallback from NASM to Yasm if the available
NASM version is too old.

(Cherry-picked from libav commit adfd7892e3b8b40e7a1620f7254459d8e096a9a1)
Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5cae5a1defa360da076365a786093a749d1ddf4e
---

 configure | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index d75aa7fe70..dd9608540e 100755
--- a/configure
+++ b/configure
@@ -5503,13 +5503,15 @@ EOF
             x86asm_debug="-g dwarf2"
             X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
         fi
+        check_x86asm "movbe ecx, [5]" && enable x86asm
     }
 
     if ! disabled_any asm mmx x86asm; then
+        disable x86asm
         for program in $x86asmexe nasm yasm; do
-            probe_x86asm $program
-            test -n "$x86asm_type" && break
+            probe_x86asm $program && break
         done
+        disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
         X86ASMFLAGS="-f $objformat"
         enabled pic               && append X86ASMFLAGS "-DPIC"
         test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
@@ -5517,8 +5519,6 @@ EOF
             elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
         esac
 
-        check_x86asm "movbe ecx, [5]" && enable x86asm ||
-            die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
         check_x86asm "vextracti128 xmm0, ymm0, 0"      || disable avx2_external
         check_x86asm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
         check_x86asm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external