Arm ASM builds are broken #931

1. 
   gmaxwell commented at 7:50 pm on May 2, 2021: contributor

   Gen_context tries to use ASM but doesn’t get linked against it:

   0gcc -O2 -fvisibility=hidden -std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Wno-unused-function -Wno-long-long -Wno-overlength-strings -W -g  gen_context.o -o gen_context
   1gen_context.o: In function `secp256k1_fe_mul':
   2/home/gmaxwell/secp256k1/src/field_10x26_impl.h:1078: undefined reference to `secp256k1_fe_mul_inner'
   3gen_context.o: In function `secp256k1_fe_sqr':
   4/home/gmaxwell/secp256k1/src/field_10x26_impl.h:1091: undefined reference to `secp256k1_fe_sqr_inner'
   5/home/gmaxwell/secp256k1/src/field_10x26_impl.h:1091: undefined reference to `secp256k1_fe_sqr_inner'
   6/home/gmaxwell/secp256k1/src/field_10x26_impl.h:1091: undefined reference to `secp256k1_fe_sqr_inner'
   7/home/gmaxwell/secp256k1/src/field_10x26_impl.h:1091: undefined reference to `secp256k1_fe_sqr_inner'
   8...
   

   Reverting a3aa2628c7b675814157556d774872755c9f1aba fixes it.

2. 
   sipa commented at 8:17 pm on May 2, 2021: contributor

   Related: going to work on adding ARM32/ARM64 CI in #930 so that these things don’t silently break.
3. real-or-random cross-referenced this on May 3, 2021 from issue Add ARM32/ARM64 CI by sipa
4. real-or-random cross-referenced this on May 3, 2021 from issue Fix gen_context/ASM build on ARM by real-or-random
5. real-or-random referenced this in commit 99f47c20ec on May 3, 2021
6. sipa closed this on May 4, 2021

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7. AdamISZ cross-referenced this on Jul 27, 2021 from issue secp256k1 version bump by kristapsk
8. dderjoel referenced this in commit bdba2ce45d on May 23, 2023

Contributors
gmaxwell sipa