1AC_PREREQ(2.52) 2 3# Process this file with autoconf to produce a configure script. 4AC_INIT([json-c], 0.12.99, [json-c@googlegroups.com]) 5 6AM_INIT_AUTOMAKE 7 8AC_PROG_MAKE_SET 9 10AC_ARG_ENABLE(rdrand, 11 AS_HELP_STRING([--enable-rdrand], 12 [Enable RDRAND Hardware RNG Hash Seed generation on supported x86/x64 platforms.]), 13[if test x$enableval = xyes; then 14 enable_rdrand=yes 15 AC_DEFINE(ENABLE_RDRAND, 1, [Enable RDRANR Hardware RNG Hash Seed]) 16fi]) 17 18if test "x$enable_rdrand" = "xyes"; then 19 AC_MSG_RESULT([RDRAND Hardware RNG Hash Seed enabled on supported x86/x64 platforms]) 20else 21 AC_MSG_RESULT([RDRAND Hardware RNG Hash Seed disabled. Use --enable-rdrand to enable]) 22fi 23 24# Checks for programs. 25 26# Checks for libraries. 27 28# Checks for header files. 29AM_PROG_CC_C_O 30AC_CONFIG_HEADER(config.h) 31AC_CONFIG_HEADER(json_config.h) 32AC_HEADER_STDC 33AC_CHECK_HEADERS(fcntl.h limits.h strings.h syslog.h unistd.h [sys/cdefs.h] [sys/param.h] stdarg.h locale.h endian.h) 34AC_CHECK_HEADER(inttypes.h,[AC_DEFINE([JSON_C_HAVE_INTTYPES_H],[1],[Public define for json_inttypes.h])]) 35 36# Checks for typedefs, structures, and compiler characteristics. 37AC_C_CONST 38AC_TYPE_SIZE_T 39 40# Checks for library functions. 41AC_FUNC_VPRINTF 42AC_FUNC_MEMCMP 43AC_FUNC_MALLOC 44AC_FUNC_REALLOC 45AC_CHECK_FUNCS(strcasecmp strdup strerror snprintf vsnprintf vasprintf open vsyslog strncasecmp setlocale) 46AC_CHECK_DECLS([INFINITY], [], [], [[#include <math.h>]]) 47AC_CHECK_DECLS([nan], [], [], [[#include <math.h>]]) 48AC_CHECK_DECLS([isnan], [], [], [[#include <math.h>]]) 49AC_CHECK_DECLS([isinf], [], [], [[#include <math.h>]]) 50AC_CHECK_DECLS([_isnan], [], [], [[#include <float.h>]]) 51AC_CHECK_DECLS([_finite], [], [], [[#include <float.h>]]) 52 53#check if .section.gnu.warning accepts long strings (for __warn_references) 54AC_LANG_PUSH([C]) 55 56AC_MSG_CHECKING([if .gnu.warning accepts long strings]) 57AC_LINK_IFELSE([AC_LANG_SOURCE([[ 58extern void json_object_get(); 59__asm__(".section .gnu.json_object_get,\n\t.ascii \"Please link against libjson-c instead of libjson\"\n\t.text"); 60 61int main(int c,char* v) {return 0;} 62]])], [ 63 AC_DEFINE(HAS_GNU_WARNING_LONG, 1, [Define if .gnu.warning accepts long strings.]) 64 AC_MSG_RESULT(yes) 65], [ 66 AC_MSG_RESULT(no) 67]) 68 69AC_LANG_POP([C]) 70 71AM_PROG_LIBTOOL 72 73# Check for the -Bsymbolic-functions linker flag 74AC_ARG_ENABLE([Bsymbolic], 75 [AS_HELP_STRING([--disable-Bsymbolic], [Avoid linking with -Bsymbolic-function])], 76 [], 77 [enable_Bsymbolic=check]) 78 79AS_IF([test "x$enable_Bsymbolic" = "xcheck"], 80 [ 81 saved_LDFLAGS="${LDFLAGS}" 82 AC_MSG_CHECKING([for -Bsymbolic-functions linker flag]) 83 LDFLAGS=-Wl,-Bsymbolic-functions 84 AC_TRY_LINK([], [int main (void) { return 0; }], 85 [ 86 AC_MSG_RESULT([yes]) 87 enable_Bsymbolic=yes 88 ], 89 [ 90 AC_MSG_RESULT([no]) 91 enable_Bsymbolic=no 92 ]) 93 LDFLAGS="${saved_LDFLAGS}" 94 ]) 95 96AS_IF([test "x$enable_Bsymbolic" = "xyes"], [JSON_BSYMBOLIC_LDFLAGS=-Wl[,]-Bsymbolic-functions]) 97AC_SUBST(JSON_BSYMBOLIC_LDFLAGS) 98 99AC_CONFIG_FILES([ 100Makefile 101json-c.pc 102tests/Makefile 103json-c-uninstalled.pc 104]) 105 106AC_OUTPUT 107 108