1 dnl ===========================================================================
2 dnl Additional macros used to configure GiNaC. We don't start our own
3 dnl additions' names with AC_ but with GINAC_ in order to steer clear of
5 dnl ===========================================================================
7 dnl Generally, it is a bad idea to put specialized header files for a library
8 dnl into a generic directory like /usr/local/include/. Instead, one should put
9 dnl them into a subdirectory. GiNaC does it, NTL does it. Unfortunately, CLN
10 dnl doesn't do so but some people choose to do it by hand. In these cases we
11 dnl need to #include <CLN/cln.h>, otherwise #include <cln.h>. This macro
12 dnl tries to be clever and find out the correct way by defining the variable
13 dnl HAVE_CLN_CLN_H in config.h:
14 AC_DEFUN(GINAC_CHECK_CLN_H,
16 AC_CHECK_HEADERS(CLN/cln.h, ,
17 AC_CHECK_HEADERS(cln.h, ,
18 AC_MSG_ERROR([cannot find header for Bruno Haible's CLN]);
23 dnl This macro is needed because the generic AC_CHECK_LIB doesn't work because
24 dnl C++ is more strongly typed than C. Therefore we need to work with the
25 dnl more fundamental AC_TRY_LINK instead.
26 AC_DEFUN(GINAC_CHECK_LIBCLN,
28 AC_MSG_CHECKING([how to link with libcln])
30 AC_CACHE_VAL(ginac_cv_lib_cln_link,
32 case "${ac_cv_header_CLN_cln_h}" in
34 AC_TRY_LINK([#include <CLN/cln.h>],
36 ginac_cv_lib_cln_link="-lcln",
37 ginac_cv_lib_cln_link="fail")
40 AC_TRY_LINK([#include <cln.h>],
42 ginac_cv_lib_cln_link="-lcln",
43 ginac_cv_lib_cln_link="fail")
47 case "${ginac_cv_lib_cln_link}" in
50 LIBS="-lcln ${saved_LIBS}"
51 AC_MSG_RESULT([-lcln])
52 GINAC_CHECK_LIBCLN_SANITY
58 AC_MSG_WARN([linking with libcln failed])
60 dnl should never ever get here:
67 dnl Check if the CLN library suits our needs, i.e. if it is new enough, by
68 dnl trying to run into a little bug which was present till version 1.0.1 and
70 AC_DEFUN(GINAC_CHECK_LIBCLN_SANITY,
72 AC_MSG_CHECKING([whether libcln behaves sane])
73 AC_CACHE_VAL(ginac_cv_lib_cln_integrity,
75 case "${ac_cv_header_CLN_cln_h}" in
77 AC_TRY_RUN([#include <CLN/cln.h>
79 cl_RA q(3); q = q/2; cl_RA p(3); p = p/2;
80 if (q+p != 3) return 1; else return 0;
82 ginac_cv_lib_cln_integrity="sane",
83 ginac_cv_lib_cln_integrity="insane",
84 ginac_cv_lib_cln_integrity="guessing sane")
87 AC_TRY_RUN([#include <cln.h>
89 cl_RA q(3); q = q/2; cl_RA p(3); p = p/2;
90 if (q+p != 3) return 1; else return 0;
92 ginac_cv_lib_cln_integrity="sane",
93 ginac_cv_lib_cln_integrity="insane",
94 ginac_cv_lib_cln_integrity="guessing sane")
98 case "${ginac_cv_lib_cln_integrity}" in
99 dnl exit status was 0:
103 dnl exit status was not 0:
106 AC_MSG_WARN([maybe version of libcln is older than 1.0.2?])
108 dnl test-program was not run because we are cross-compiling:
110 AC_MSG_RESULT([hopefully])
112 dnl should never ever get here:
114 AC_MSG_WARN([you found a bug in the configure script!])