Tracking issue for manual (non-autotools) builds #929

1. 
   real-or-random commented at 10:16 am on May 2, 2021: contributor

   The current method to build a static library manually (using default options) is:

   0gcc -O2 -c src/secp256k1.c src/precomputed_*.c 
   1ar rcs libsecp256k1.a secp256k1.o precomputed_*.o
   

   (clang also works)

   The goal is to get rid of most of the command line arguments, at least on GCC and clang:

   • -DSECP256K1_BUILD: #928
   • -I #925
   • -D ECMULT_GEN_PREC_BITS=4 -D ECMULT_WINDOW_SIZE=15: See discussion in #918. We could even print the config using #pragma message)
   • -D DUSE_EXTERNAL_ASM: #929 (comment)
   • -Wno-unused-function: We could add a #pragma or better add __attribute__ ((unsused)) to the relevant functions.
   • -Wall -Wextra: We could set this via #pragmas but maybe we should leave this to the user.
   • -O2: I think we should really leave this to the user.
   • Add section to README
   • Add CI jobs to test these builds
2. 
   real-or-random commented at 8:34 pm on May 2, 2021: contributor

   -Wno-unused-function: We could add a #pragma or better add attribute ((unsused)) to the relevant functions.

   There are no unused functions except for ones that are unneeded because of test harness or module configuration options.

   Sure? I think at least the multimultiplication functions and the scratch space functions are currently unused.

3. real-or-random cross-referenced this on May 13, 2021 from issue Various improvements related to CFLAGS by real-or-random
4. real-or-random renamed this:
   Tracking issue for non-autotool builds
   Tracking issue for non-autotools builds
   on Dec 9, 2021
5. 
   real-or-random commented at 10:56 am on December 20, 2021: contributor

   Now that #1042 has been merged, we need to build multiple modules:

   0gcc -c src/secp256k1.c src/precomputed_*.c -DECMULT_GEN_PREC_BITS=4 -DECMULT_WINDOW_SIZE=15
   1ar rcs libsecp256k1.a secp256k1.o precomputed_*.o
   

6. real-or-random cross-referenced this on Dec 31, 2021 from issue Signed-digit multi-comb ecmult_gen algorithm by sipa
7. real-or-random cross-referenced this on Feb 8, 2022 from issue WIP: Add 1:1 CMake File by DesWurstes
8. elichai cross-referenced this on Apr 3, 2022 from issue How to use the library? by ShaliDaliHaliDa
9. real-or-random cross-referenced this on Jun 30, 2022 from issue build: Add CMake-based build system by hebasto
10. real-or-random referenced this in commit d63719fb10 on Jun 30, 2022
11. real-or-random cross-referenced this on Jun 30, 2022 from issue build: Fix #include "..." paths to get rid of further -I arguments by real-or-random
12. real-or-random referenced this in commit ac39773ba9 on Jun 30, 2022
13. real-or-random referenced this in commit 40a3473a9d on Jul 1, 2022
14. real-or-random referenced this in commit af65d30cc8 on Jul 1, 2022
15. real-or-random cross-referenced this on Jul 6, 2022 from issue SECP256K1_BUILD sanity checking and USE_FIELD_INV_BUILTIN/USE_SCALAR_INV_BUILTIN simplification. by gmaxwell
16. real-or-random renamed this:
    Tracking issue for non-autotools builds
    Tracking issue for manual (non-autotools) builds
    on Jul 6, 2022
17. real-or-random referenced this in commit d0cf55e13a on Jul 6, 2022
18. real-or-random cross-referenced this on Jul 6, 2022 from issue config: Set preprocessor defaults for ECMULT_* config values by real-or-random
19. real-or-random cross-referenced this on Dec 7, 2022 from issue Fix backport of bitcoin-core/secp256k1#925 (drop 'include/' prefix from -I) by mattiaferrari02
20. real-or-random cross-referenced this on Dec 21, 2022 from issue Symbol visibility by real-or-random
21. real-or-random cross-referenced this on Jan 5, 2023 from issue Create a document for embedded use by gmaxwell
22. real-or-random added the label documentation on Jan 5, 2023
23. real-or-random added the label build on Jan 5, 2023
24. dderjoel referenced this in commit 16062f8875 on May 23, 2023
25. dderjoel referenced this in commit c65199ef4a on May 23, 2023
26. 
    hebasto commented at 10:41 am on July 2, 2023: member

    • -Wall -Wextra: We could set this via #pragmas but maybe we should leave this to the user.

    • -O2: I think we should really leave this to the user.

    Agreed, both options should be left to the user.

    When building a shared library, providing the -Wl,--no-undefined option might be a good way to ensure that the resulted library is OK:

    0gcc -O2 -fPIC -c src/secp256k1.c src/precomputed_*.c
    1gcc secp256k1.o precomputed_*.o -shared -Wl,--no-undefined -o libsecp256k1.so
    

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real-or-random hebasto

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