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# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_PROG_CC_FOR_BUILD
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#
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# DESCRIPTION
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#
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# This macro searches for a C compiler that generates native executables,
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# that is a C compiler that surely is not a cross-compiler. This can be
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# useful if you have to generate source code at compile-time like for
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# example GCC does.
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#
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# The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything
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# needed to compile or link (CC_FOR_BUILD) and preprocess (CPP_FOR_BUILD).
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# The value of these variables can be overridden by the user by specifying
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# a compiler with an environment variable (like you do for standard CC).
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#
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# It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and object
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# file extensions for the build platform, and GCC_FOR_BUILD to `yes' if
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# the compiler we found is GCC. All these variables but GCC_FOR_BUILD are
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# substituted in the Makefile.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 8
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AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD])
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AC_DEFUN([AX_PROG_CC_FOR_BUILD], [dnl
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AC_REQUIRE([AC_PROG_CC])dnl
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AC_REQUIRE([AC_PROG_CPP])dnl
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AC_REQUIRE([AC_EXEEXT])dnl
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AC_REQUIRE([AC_CANONICAL_HOST])dnl
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dnl Use the standard macros, but make them use other variable names
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dnl
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pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl
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pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl
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pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl
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pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl
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pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl
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pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl
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pushdef([ac_cv_objext], ac_cv_build_objext)dnl
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pushdef([ac_exeext], ac_build_exeext)dnl
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pushdef([ac_objext], ac_build_objext)dnl
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pushdef([CC], CC_FOR_BUILD)dnl
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pushdef([CPP], CPP_FOR_BUILD)dnl
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pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl
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pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl
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pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl
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pushdef([host], build)dnl
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pushdef([host_alias], build_alias)dnl
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pushdef([host_cpu], build_cpu)dnl
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pushdef([host_vendor], build_vendor)dnl
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pushdef([host_os], build_os)dnl
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pushdef([ac_cv_host], ac_cv_build)dnl
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pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl
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pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl
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pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl
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pushdef([ac_cv_host_os], ac_cv_build_os)dnl
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pushdef([ac_cpp], ac_build_cpp)dnl
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pushdef([ac_compile], ac_build_compile)dnl
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pushdef([ac_link], ac_build_link)dnl
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save_cross_compiling=$cross_compiling
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save_ac_tool_prefix=$ac_tool_prefix
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cross_compiling=no
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ac_tool_prefix=
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AC_PROG_CC
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AC_PROG_CPP
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AC_EXEEXT
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ac_tool_prefix=$save_ac_tool_prefix
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cross_compiling=$save_cross_compiling
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dnl Restore the old definitions
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dnl
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popdef([ac_link])dnl
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popdef([ac_compile])dnl
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popdef([ac_cpp])dnl
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popdef([ac_cv_host_os])dnl
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popdef([ac_cv_host_vendor])dnl
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popdef([ac_cv_host_cpu])dnl
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popdef([ac_cv_host_alias])dnl
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popdef([ac_cv_host])dnl
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popdef([host_os])dnl
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popdef([host_vendor])dnl
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popdef([host_cpu])dnl
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popdef([host_alias])dnl
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popdef([host])dnl
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popdef([LDFLAGS])dnl
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popdef([CPPFLAGS])dnl
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popdef([CFLAGS])dnl
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popdef([CPP])dnl
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popdef([CC])dnl
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popdef([ac_objext])dnl
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popdef([ac_exeext])dnl
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popdef([ac_cv_objext])dnl
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popdef([ac_cv_exeext])dnl
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popdef([ac_cv_prog_cc_g])dnl
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popdef([ac_cv_prog_cc_cross])dnl
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popdef([ac_cv_prog_cc_works])dnl
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popdef([ac_cv_prog_gcc])dnl
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popdef([ac_cv_prog_CPP])dnl
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dnl Finally, set Makefile variables
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dnl
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BUILD_EXEEXT=$ac_build_exeext
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BUILD_OBJEXT=$ac_build_objext
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AC_SUBST(BUILD_EXEEXT)dnl
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AC_SUBST(BUILD_OBJEXT)dnl
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AC_SUBST([CFLAGS_FOR_BUILD])dnl
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AC_SUBST([CPPFLAGS_FOR_BUILD])dnl
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AC_SUBST([LDFLAGS_FOR_BUILD])dnl
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])
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+89
@@ -0,0 +1,89 @@
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dnl escape "$0x" below using the m4 quadrigaph @S|@, and escape it again with a \ for the shell.
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AC_DEFUN([SECP_64BIT_ASM_CHECK],[
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AC_MSG_CHECKING(for x86_64 assembly availability)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <stdint.h>]],[[
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uint64_t a = 11, tmp;
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__asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
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]])],[has_64bit_asm=yes],[has_64bit_asm=no])
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AC_MSG_RESULT([$has_64bit_asm])
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])
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dnl
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AC_DEFUN([SECP_OPENSSL_CHECK],[
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has_libcrypto=no
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m4_ifdef([PKG_CHECK_MODULES],[
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PKG_CHECK_MODULES([CRYPTO], [libcrypto], [has_libcrypto=yes],[has_libcrypto=no])
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if test x"$has_libcrypto" = x"yes"; then
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TEMP_LIBS="$LIBS"
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LIBS="$LIBS $CRYPTO_LIBS"
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AC_CHECK_LIB(crypto, main,[AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])],[has_libcrypto=no])
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LIBS="$TEMP_LIBS"
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fi
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])
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if test x$has_libcrypto = xno; then
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AC_CHECK_HEADER(openssl/crypto.h,[
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AC_CHECK_LIB(crypto, main,[
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has_libcrypto=yes
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CRYPTO_LIBS=-lcrypto
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AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])
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])
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])
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LIBS=
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fi
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if test x"$has_libcrypto" = x"yes" && test x"$has_openssl_ec" = x; then
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AC_MSG_CHECKING(for EC functions in libcrypto)
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CPPFLAGS_TEMP="$CPPFLAGS"
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CPPFLAGS="$CRYPTO_CPPFLAGS $CPPFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include <openssl/ecdsa.h>
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#include <openssl/obj_mac.h>]],[[
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# if OPENSSL_VERSION_NUMBER < 0x10100000L
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void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) {(void)sig->r; (void)sig->s;}
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# endif
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unsigned int zero = 0;
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const unsigned char *zero_ptr = (unsigned char*)&zero;
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EC_KEY_free(EC_KEY_new_by_curve_name(NID_secp256k1));
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EC_KEY *eckey = EC_KEY_new();
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EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp256k1);
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EC_KEY_set_group(eckey, group);
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ECDSA_sign(0, NULL, 0, NULL, &zero, eckey);
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ECDSA_verify(0, NULL, 0, NULL, 0, eckey);
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o2i_ECPublicKey(&eckey, &zero_ptr, 0);
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d2i_ECPrivateKey(&eckey, &zero_ptr, 0);
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EC_KEY_check_key(eckey);
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EC_KEY_free(eckey);
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EC_GROUP_free(group);
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ECDSA_SIG *sig_openssl;
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sig_openssl = ECDSA_SIG_new();
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d2i_ECDSA_SIG(&sig_openssl, &zero_ptr, 0);
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i2d_ECDSA_SIG(sig_openssl, NULL);
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ECDSA_SIG_get0(sig_openssl, NULL, NULL);
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ECDSA_SIG_free(sig_openssl);
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const BIGNUM *bignum = BN_value_one();
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BN_is_negative(bignum);
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BN_num_bits(bignum);
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if (sizeof(zero) >= BN_num_bytes(bignum)) {
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BN_bn2bin(bignum, (unsigned char*)&zero);
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}
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]])],[has_openssl_ec=yes],[has_openssl_ec=no])
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AC_MSG_RESULT([$has_openssl_ec])
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CPPFLAGS="$CPPFLAGS_TEMP"
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fi
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])
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dnl
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AC_DEFUN([SECP_GMP_CHECK],[
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if test x"$has_gmp" != x"yes"; then
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CPPFLAGS_TEMP="$CPPFLAGS"
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CPPFLAGS="$GMP_CPPFLAGS $CPPFLAGS"
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LIBS_TEMP="$LIBS"
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LIBS="$GMP_LIBS $LIBS"
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AC_CHECK_HEADER(gmp.h,[AC_CHECK_LIB(gmp, __gmpz_init,[has_gmp=yes; GMP_LIBS="$GMP_LIBS -lgmp"; AC_DEFINE(HAVE_LIBGMP,1,[Define this symbol if libgmp is installed])])])
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CPPFLAGS="$CPPFLAGS_TEMP"
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LIBS="$LIBS_TEMP"
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fi
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])
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