github.com/k1rill-fedoseev/go-ethereum@v1.9.7/crypto/secp256k1/libsecp256k1/build-aux/m4/bitcoin_secp.m4 (about)

     1  dnl libsecp25k1 helper checks
     2  AC_DEFUN([SECP_INT128_CHECK],[
     3  has_int128=$ac_cv_type___int128
     4  ])
     5  
     6  dnl escape "$0x" below using the m4 quadrigaph @S|@, and escape it again with a \ for the shell.
     7  AC_DEFUN([SECP_64BIT_ASM_CHECK],[
     8  AC_MSG_CHECKING(for x86_64 assembly availability)
     9  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
    10    #include <stdint.h>]],[[
    11    uint64_t a = 11, tmp;
    12    __asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
    13    ]])],[has_64bit_asm=yes],[has_64bit_asm=no])
    14  AC_MSG_RESULT([$has_64bit_asm])
    15  ])
    16  
    17  dnl
    18  AC_DEFUN([SECP_OPENSSL_CHECK],[
    19    has_libcrypto=no
    20    m4_ifdef([PKG_CHECK_MODULES],[
    21      PKG_CHECK_MODULES([CRYPTO], [libcrypto], [has_libcrypto=yes],[has_libcrypto=no])
    22      if test x"$has_libcrypto" = x"yes"; then
    23        TEMP_LIBS="$LIBS"
    24        LIBS="$LIBS $CRYPTO_LIBS"
    25        AC_CHECK_LIB(crypto, main,[AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])],[has_libcrypto=no])
    26        LIBS="$TEMP_LIBS"
    27      fi
    28    ])
    29    if test x$has_libcrypto = xno; then
    30      AC_CHECK_HEADER(openssl/crypto.h,[
    31        AC_CHECK_LIB(crypto, main,[
    32          has_libcrypto=yes
    33          CRYPTO_LIBS=-lcrypto
    34          AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])
    35        ])
    36      ])
    37      LIBS=
    38    fi
    39  if test x"$has_libcrypto" = x"yes" && test x"$has_openssl_ec" = x; then
    40    AC_MSG_CHECKING(for EC functions in libcrypto)
    41    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
    42      #include <openssl/ec.h>
    43      #include <openssl/ecdsa.h>
    44      #include <openssl/obj_mac.h>]],[[
    45      EC_KEY *eckey = EC_KEY_new_by_curve_name(NID_secp256k1);
    46      ECDSA_sign(0, NULL, 0, NULL, NULL, eckey);
    47      ECDSA_verify(0, NULL, 0, NULL, 0, eckey);
    48      EC_KEY_free(eckey);
    49      ECDSA_SIG *sig_openssl;
    50      sig_openssl = ECDSA_SIG_new();
    51      (void)sig_openssl->r;
    52      ECDSA_SIG_free(sig_openssl);
    53    ]])],[has_openssl_ec=yes],[has_openssl_ec=no])
    54    AC_MSG_RESULT([$has_openssl_ec])
    55  fi
    56  ])
    57  
    58  dnl
    59  AC_DEFUN([SECP_GMP_CHECK],[
    60  if test x"$has_gmp" != x"yes"; then
    61    CPPFLAGS_TEMP="$CPPFLAGS"
    62    CPPFLAGS="$GMP_CPPFLAGS $CPPFLAGS"
    63    LIBS_TEMP="$LIBS"
    64    LIBS="$GMP_LIBS $LIBS"
    65    AC_CHECK_HEADER(gmp.h,[AC_CHECK_LIB(gmp, __gmpz_init,[has_gmp=yes; GMP_LIBS="$GMP_LIBS -lgmp"; AC_DEFINE(HAVE_LIBGMP,1,[Define this symbol if libgmp is installed])])])
    66    CPPFLAGS="$CPPFLAGS_TEMP"
    67    LIBS="$LIBS_TEMP"
    68  fi
    69  ])