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文件: /usr/share/aclocal/ax_c_long_long.m4
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# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_c_long_long.html # =========================================================================== # # SYNOPSIS # # AX_C_LONG_LONG # # DESCRIPTION # # Provides a test for the existence of the long long int type and defines # HAVE_LONG_LONG if it is found. # # LICENSE # # Copyright (c) 2008 Caolan McNamara <caolan@skynet.ie> # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. This file is offered as-is, without any # warranty. #serial 6 AU_ALIAS([AC_C_LONG_LONG], [AX_C_LONG_LONG]) AC_DEFUN([AX_C_LONG_LONG], [AC_CACHE_CHECK(for long long int, ac_cv_c_long_long, [if test "$GCC" = yes; then ac_cv_c_long_long=yes else AC_TRY_COMPILE(,[long long int i;], ac_cv_c_long_long=yes, ac_cv_c_long_long=no) fi]) if test $ac_cv_c_long_long = yes; then AC_DEFINE(HAVE_LONG_LONG, 1, [compiler understands long long]) fi ])
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