aria2/m4/openssl.m4

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AC_DEFUN([AM_PATH_OPENSSL],
[
AC_ARG_WITH([openssl-prefix],
[ --with-openssl-prefix=PREFIX Prefix where OpenSSL installed (optional)],
[openssl_prefix=$withval],
[openssl_prefix=""])
if test "x$openssl_prefix" = "x"; then
openssl_prefix="/usr/local"
fi
openssl_prefix_lib=$openssl_prefix/lib
openssl_prefix_include=$openssl_prefix/include
LIBS_save=$LIBS
CPPFLAGS_save=$CPPFLAGS
LIBS="-L$openssl_prefix_lib $LIBS"
CPPFLAGS="-I$openssl_prefix_include $CPPFLAGS"
AC_CHECK_LIB([ssl], [SSL_library_init], [have_openssl=yes; LIBS="-lssl $LIBS"])
if test "x$have_openssl" = "xyes"; then
have_openssl=no
AC_CHECK_LIB([crypto], [main], [have_openssl=yes; LIBS="-lcrypto $LIBS"])
if test "x$have_openssl" = "xyes"; then
AC_DEFINE([HAVE_LIBSSL], [1], [Define to 1 if you have openssl.])
dnl check whether EVP_DigestInit_ex exists. Old openssl doesn't have it.
AC_CHECK_FUNCS([EVP_DigestInit_ex], [have_digestinit_ex=yes])
if test "x$have_digestinit_ex" = "x"; then
AC_DEFINE([HAVE_OLD_LIBSSL], [1], [Define to 1 if you have old openssl.])
fi
OPENSSL_LIBS="-L$openssl_prefix_lib -lssl -lcrypto"
OPENSSL_CFLAGS="-I$openssl_prefix_include"
AC_SUBST(OPENSSL_LIBS)
AC_SUBST(OPENSSL_CFLAGS)
dnl search for sha256 support
AC_CHECK_FUNCS([EVP_sha256])
fi
fi
LIBS=$LIBS_save
CPPFLAGS=$CPPFLAGS_save
])