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build: Fix warnings in x86_64 assembly check

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This change fixes:
- `-Wuninitialized` in both Autotools and CMake;
- `-Wreturn-type` in CMake only.
This commit is contained in:
Hennadii Stepanov
2025-09-17 23:19:12 +01:00
parent 10dab907e7
commit ab560078aa
2 changed files with 4 additions and 3 deletions
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2
build-aux/m4/bitcoin_secp.m4
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@@ -3,7 +3,7 @@ AC_DEFUN([SECP_X86_64_ASM_CHECK],[
AC_MSG_CHECKING(for x86_64 assembly availability) AC_MSG_CHECKING(for x86_64 assembly availability)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>]],[[ #include <stdint.h>]],[[
uint64_t a = 11, tmp; uint64_t a = 11, tmp = 0;
__asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx"); __asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
]])], [has_x86_64_asm=yes], [has_x86_64_asm=no]) ]])], [has_x86_64_asm=yes], [has_x86_64_asm=no])
AC_MSG_RESULT([$has_x86_64_asm]) AC_MSG_RESULT([$has_x86_64_asm])

5
cmake/CheckX86_64Assembly.cmake
View File

@@ -4,10 +4,11 @@ function(check_x86_64_assembly)
check_c_source_compiles(" check_c_source_compiles("
#include <stdint.h> #include <stdint.h>
int main() int main(void)
{ {
uint64_t a = 11, tmp; uint64_t a = 11, tmp = 0;
__asm__ __volatile__(\"movq $0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\"); __asm__ __volatile__(\"movq $0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\");
return 0;
} }
" HAVE_X86_64_ASM) " HAVE_X86_64_ASM)
set(HAVE_X86_64_ASM ${HAVE_X86_64_ASM} PARENT_SCOPE) set(HAVE_X86_64_ASM ${HAVE_X86_64_ASM} PARENT_SCOPE)