mirror of https://github.com/bitcoin/bitcoin
56 lines
1.8 KiB
Plaintext
56 lines
1.8 KiB
Plaintext
dnl escape "$0x" below using the m4 quadrigaph @S|@, and escape it again with a \ for the shell.
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AC_DEFUN([SECP_64BIT_ASM_CHECK],[
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AC_MSG_CHECKING(for x86_64 assembly availability)
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[
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#include <stdint.h>]],[[
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uint64_t a = 11, tmp;
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__asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
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]])],[has_64bit_asm=yes],[has_64bit_asm=no])
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AC_MSG_RESULT([$has_64bit_asm])
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])
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AC_DEFUN([SECP_VALGRIND_CHECK],[
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AC_MSG_CHECKING([for valgrind support])
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if test x"$has_valgrind" != x"yes"; then
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CPPFLAGS_TEMP="$CPPFLAGS"
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CPPFLAGS="$VALGRIND_CPPFLAGS $CPPFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <valgrind/memcheck.h>
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]], [[
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#if defined(NVALGRIND)
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# error "Valgrind does not support this platform."
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#endif
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]])], [has_valgrind=yes; AC_DEFINE(HAVE_VALGRIND,1,[Define this symbol if valgrind is installed, and it supports the host platform])])
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fi
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AC_MSG_RESULT($has_valgrind)
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])
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dnl SECP_TRY_APPEND_CFLAGS(flags, VAR)
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dnl Append flags to VAR if CC accepts them.
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AC_DEFUN([SECP_TRY_APPEND_CFLAGS], [
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AC_MSG_CHECKING([if ${CC} supports $1])
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SECP_TRY_APPEND_CFLAGS_saved_CFLAGS="$CFLAGS"
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CFLAGS="$1 $CFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])], [flag_works=yes], [flag_works=no])
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AC_MSG_RESULT($flag_works)
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CFLAGS="$SECP_TRY_APPEND_CFLAGS_saved_CFLAGS"
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if test x"$flag_works" = x"yes"; then
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$2="$$2 $1"
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fi
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unset flag_works
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AC_SUBST($2)
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])
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dnl SECP_SET_DEFAULT(VAR, default, default-dev-mode)
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dnl Set VAR to default or default-dev-mode, depending on whether dev mode is enabled
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AC_DEFUN([SECP_SET_DEFAULT], [
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if test "${enable_dev_mode+set}" != set; then
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AC_MSG_ERROR([[Set enable_dev_mode before calling SECP_SET_DEFAULT]])
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fi
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if test x"$enable_dev_mode" = x"yes"; then
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$1="$3"
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else
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$1="$2"
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fi
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])
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