The x86 assembly FFT implementation uses dispatch tables in .text. This is

incompatible with x-only so move them into .data.rel.ro where we can have
relocations.  But since they are in the RELRO segment they will be made
read-only by ld.so after relocations have been processed.

ok robert@ (who tested i386)

graphics/ffmpeg/Makefile

@@ -2,7 +2,7 @@ COMMENT=	audio/video converter and streamer
 
 V=		4.4.3
 DISTNAME=	ffmpeg-${V}
-REVISION=	2
+REVISION=	3
 EPOCH=		1
 CATEGORIES=	graphics multimedia
 MASTER_SITES=	https://ffmpeg.org/releases/

graphics/ffmpeg/patches/patch-libavcodec_x86_fft_asm

@@ -0,0 +1,37 @@
+Index: libavcodec/x86/fft.asm
+--- libavcodec/x86/fft.asm.orig
++++ libavcodec/x86/fft.asm
+@@ -548,10 +548,6 @@ DEFINE_ARGS zc, w, n, o1, o3
+ %macro FFT_DISPATCH 2; clobbers 5 GPRs, 8 XMMs
+     lea r2, [dispatch_tab%1]
+     mov r2, [r2 + (%2q-2)*gprsize]
+-%ifdef PIC
+-    lea r3, [$$]
+-    add r2, r3
+-%endif
+     call r2
+ %endmacro ; FFT_DISPATCH
+ 
+@@ -731,11 +727,7 @@ DECL_PASS pass_interleave_3dnow, PASS_BIG 0
+ %define pass_interleave_3dnowext pass_interleave_3dnow
+ %endif
+ 
+-%ifdef PIC
+-%define SECTION_REL - $$
+-%else
+ %define SECTION_REL
+-%endif
+ 
+ %macro DECL_FFT 1-2 ; nbits, suffix
+ %ifidn %0, 1
+@@ -773,8 +765,10 @@ fft %+ n %+ fullsuffix:
+ %endrep
+ %undef n
+ 
++[SECTION .data.rel.ro write]
+ align 8
+ dispatch_tab %+ fullsuffix: pointer list_of_fft
++__?SECT?__
+ %endmacro ; DECL_FFT
+ 
+ %if HAVE_AVX_EXTERNAL