| 1 | # Check for GMP |
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| 2 | # Modified by Pascal Giorgi, 2003-12-03 |
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| 3 | |
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| 4 | dnl LB_CHECK_GMP ([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) |
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| 5 | dnl |
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| 6 | dnl Test for the GNU Multiprecision library and define GMP_CFLAGS and GMP_LIBS |
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| 7 | |
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| 8 | AC_DEFUN([LB_CHECK_GMP], |
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| 9 | [ |
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| 10 | DEFAULT_CHECKING_PATH="/usr /usr/local /sw /opt/local" |
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| 11 | |
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| 12 | AC_ARG_WITH(gmp, |
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| 13 | [ --with-gmp= <path>|yes Use GMP library. This library is mandatory for Singular |
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| 14 | compilation. If argument is yes or <empty> that means |
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| 15 | the library is reachable with the standard search path |
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| 16 | "/usr" or "/usr/local" (set as default). Otherwise you |
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| 17 | give the <path> to the directory which contain the |
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| 18 | library. |
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| 19 | ], |
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| 20 | [if test "$withval" = yes ; then |
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| 21 | GMP_HOME_PATH="${DEFAULT_CHECKING_PATH}" |
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| 22 | elif test "$withval" != no ; then |
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| 23 | GMP_HOME_PATH="$withval ${DEFAULT_CHECKING_PATH}" |
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| 24 | fi], |
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| 25 | [GMP_HOME_PATH="${DEFAULT_CHECKING_PATH}"]) |
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| 26 | |
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| 27 | min_gmp_version=ifelse([$1], ,1.0,$1) |
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| 28 | |
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| 29 | dnl Check for existence |
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| 30 | BACKUP_CFLAGS=${CFLAGS} |
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| 31 | BACKUP_LIBS=${LIBS} |
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| 32 | |
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| 33 | AC_MSG_CHECKING(for GMP >= $min_gmp_version) |
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| 34 | |
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| 35 | AC_LANG_PUSH([C]) |
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| 36 | |
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| 37 | for GMP_HOME in ${GMP_HOME_PATH} |
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| 38 | do |
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| 39 | # if test -r "$GMP_HOME/include/gmp.h"; then |
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| 40 | |
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| 41 | if test "x$GMP_HOME" != "x/usr"; then |
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| 42 | GMP_CFLAGS="-I${GMP_HOME}/include" |
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| 43 | GMP_LIBS="-L${GMP_HOME}/lib -lgmp" |
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| 44 | else |
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| 45 | GMP_CFLAGS="" |
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| 46 | GMP_LIBS="-lgmp" |
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| 47 | fi |
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| 48 | |
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| 49 | CFLAGS="${BACKUP_CFLAGS} ${GMP_CFLAGS}" |
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| 50 | LIBS="${BACKUP_LIBS} ${GMP_LIBS}" |
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| 51 | |
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| 52 | # According to C. Fieker this would link but would not RUN |
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| 53 | # (AC_TRY_RUN) due to missing SHARED libgmp.so :( |
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| 54 | # TODO: set LD_LIBRARY_PATH??? |
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| 55 | AC_TRY_LINK( |
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| 56 | [#include <gmp.h>], |
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| 57 | [mpz_t a; mpz_init (a);], |
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| 58 | [ |
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| 59 | AC_TRY_RUN( |
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| 60 | [#include <gmp.h> |
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| 61 | int main () { if (__GNU_MP_VERSION < 3) return -1; else return 0; } |
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| 62 | ],[ |
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| 63 | AC_MSG_RESULT(found) |
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| 64 | AC_SUBST(GMP_CFLAGS) |
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| 65 | AC_SUBST(GMP_LIBS) |
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| 66 | AC_DEFINE(HAVE_GMP,1,[Define if GMP is installed]) |
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| 67 | # See if we are running GMP 4.0 |
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| 68 | AC_MSG_CHECKING(whether GMP is 4.0 or greater) |
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| 69 | AC_TRY_RUN( |
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| 70 | [#include <gmp.h> |
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| 71 | int main () { if (__GNU_MP_VERSION < 4) return -1; else return 0; } |
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| 72 | ],[ |
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| 73 | gmp_found="yes" |
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| 74 | AC_MSG_RESULT(yes) |
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| 75 | GMP_VERSION="" |
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| 76 | AC_SUBST(GMP_VERSION) |
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| 77 | ],[ |
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| 78 | AC_MSG_RESULT(no) |
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| 79 | AC_DEFINE(GMP_VERSION_3,1,[Define if GMP is version 3.xxx]) |
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| 80 | GMP_VERSION="-DGMP_VERSION_3" |
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| 81 | AC_SUBST(GMP_VERSION) |
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| 82 | ],[ |
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| 83 | dnl This should never happen |
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| 84 | AC_MSG_RESULT(no) |
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| 85 | ]) |
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| 86 | ifelse([$2], , :, [$2]) |
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| 87 | break |
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| 88 | ],[ |
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| 89 | gmp_problem="$gmp_problem $GMP_HOME" |
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| 90 | unset GMP_CFLAGS |
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| 91 | unset GMP_LIBS |
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| 92 | ],[ |
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| 93 | AC_MSG_RESULT(unknown) |
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| 94 | echo "WARNING: You appear to be cross compiling, so there is no way to determine" |
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| 95 | echo "whether your GMP version is new enough. I am assuming it is." |
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| 96 | AC_SUBST(GMP_CFLAGS) |
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| 97 | AC_SUBST(GMP_LIBS) |
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| 98 | AC_SUBST(GMP_HOME) |
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| 99 | HAVE_GMP=yes |
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| 100 | AC_DEFINE(HAVE_GMP,1,[Define if GMP is installed]) |
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| 101 | ifelse([$2], , :, [$2]) |
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| 102 | break |
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| 103 | ]) |
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| 104 | ],[ |
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| 105 | gmp_found="no" |
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| 106 | unset GMP_CFLAGS |
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| 107 | unset GMP_LIBS |
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| 108 | ]) |
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| 109 | |
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| 110 | # else |
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| 111 | # gmp_found="no" |
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| 112 | # fi |
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| 113 | done |
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| 114 | AC_LANG_POP([C]) |
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| 115 | |
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| 116 | CFLAGS=${BACKUP_CFLAGS} |
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| 117 | LIBS=${BACKUP_LIBS} |
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| 118 | #unset LD_LIBRARY_PATH |
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| 119 | |
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| 120 | |
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| 121 | if test "x$gmp_found" != "xyes"; then |
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| 122 | if test -n "$gmp_problem"; then |
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| 123 | AC_MSG_RESULT(problem) |
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| 124 | echo "Sorry, your GMP version is too old. Disabling." |
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| 125 | elif test "x$gmp_found" != "xno"; then |
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| 126 | AC_MSG_RESULT(not found) |
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| 127 | fi |
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| 128 | ifelse($3, , :, $3) |
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| 129 | fi |
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| 130 | |
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| 131 | AM_CONDITIONAL(SING_HAVE_GMP, test "x$HAVE_GMP" = "xyes") |
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| 132 | ]) |
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