csecp256k1

Haskell FFI bindings to bitcoin-core/secp256k1 (docs.ppad.tech/csecp256k1).
git clone git://git.ppad.tech/csecp256k1.git
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TryAppendCFlags.cmake (713B)

      1 include(CheckCCompilerFlag)
      2 
      3 function(haskellsecp256k1_v0_1_0_check_c_flags_internal flags output)
      4   string(MAKE_C_IDENTIFIER "${flags}" result)
      5   string(TOUPPER "${result}" result)
      6   set(result "C_SUPPORTS_${result}")
      7   if(NOT MSVC)
      8     set(CMAKE_REQUIRED_FLAGS "-Werror")
      9   endif()
     10 
     11   # This avoids running a linker.
     12   set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
     13   check_c_compiler_flag("${flags}" ${result})
     14 
     15   set(${output} ${${result}} PARENT_SCOPE)
     16 endfunction()
     17 
     18 # Append flags to the COMPILE_OPTIONS directory property if CC accepts them.
     19 macro(try_append_c_flags)
     20   haskellsecp256k1_v0_1_0_check_c_flags_internal("${ARGV}" result)
     21   if(result)
     22     add_compile_options(${ARGV})
     23   endif()
     24 endmacro()