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Annotation of embedaddon/libiconv/m4/general.m4, revision 1.1.1.1

1.1       misho       1: dnl Copyright (C) 1993-2003 Free Software Foundation, Inc.
                      2: dnl This file is free software, distributed under the terms of the GNU
                      3: dnl General Public License.  As a special exception to the GNU General
                      4: dnl Public License, this file may be distributed as part of a program
                      5: dnl that contains a configuration script generated by Autoconf, under
                      6: dnl the same distribution terms as the rest of that program.
                      7: 
                      8: dnl From Bruno Haible, Marcus Daniels, Sam Steingold.
                      9: 
                     10: AC_PREREQ(2.13)
                     11: 
                     12: dnl without AC_MSG_...:   with AC_MSG_... and caching:
                     13: dnl   AC_TRY_CPP          CL_CPP_CHECK
                     14: dnl   AC_TRY_COMPILE      CL_COMPILE_CHECK
                     15: dnl   AC_TRY_LINK         CL_LINK_CHECK
                     16: dnl   AC_TRY_RUN          CL_RUN_CHECK - would require cross-compiling support
                     17: dnl Usage:
                     18: dnl AC_TRY_CPP(INCLUDES,
                     19: dnl            ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
                     20: dnl CL_CPP_CHECK(ECHO-TEXT, CACHE-ID,
                     21: dnl              INCLUDES,
                     22: dnl              ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
                     23: dnl AC_TRY_xxx(INCLUDES, FUNCTION-BODY,
                     24: dnl            ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
                     25: dnl CL_xxx_CHECK(ECHO-TEXT, CACHE-ID,
                     26: dnl              INCLUDES, FUNCTION-BODY,
                     27: dnl              ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
                     28: 
                     29: AC_DEFUN([CL_CPP_CHECK],
                     30: [AC_MSG_CHECKING(for $1)
                     31: AC_CACHE_VAL($2,[
                     32: AC_TRY_CPP([$3], $2=yes, $2=no)
                     33: ])
                     34: AC_MSG_RESULT([$]$2)
                     35: if test [$]$2 = yes; then
                     36:   ifelse([$4], , :, [$4])
                     37: ifelse([$5], , , [else
                     38:   $5
                     39: ])dnl
                     40: fi
                     41: ])
                     42: 
                     43: AC_DEFUN([CL_COMPILE_CHECK],
                     44: [AC_MSG_CHECKING(for $1)
                     45: AC_CACHE_VAL($2,[
                     46: AC_TRY_COMPILE([$3],[$4], $2=yes, $2=no)
                     47: ])
                     48: AC_MSG_RESULT([$]$2)
                     49: if test [$]$2 = yes; then
                     50:   ifelse([$5], , :, [$5])
                     51: ifelse([$6], , , [else
                     52:   $6
                     53: ])dnl
                     54: fi
                     55: ])
                     56: 
                     57: AC_DEFUN([CL_LINK_CHECK],
                     58: [AC_MSG_CHECKING(for $1)
                     59: AC_CACHE_VAL($2,[
                     60: AC_TRY_LINK([$3],[$4], $2=yes, $2=no)
                     61: ])
                     62: AC_MSG_RESULT([$]$2)
                     63: if test [$]$2 = yes; then
                     64:   ifelse([$5], , :, [$5])
                     65: ifelse([$6], , , [else
                     66:   $6
                     67: ])dnl
                     68: fi
                     69: ])
                     70: 
                     71: dnl CL_SILENT(ACTION)
                     72: dnl performs ACTION, with AC_MSG_CHECKING and AC_MSG_RESULT being defined away.
                     73: AC_DEFUN([CL_SILENT],
                     74: [pushdef([AC_MSG_CHECKING],[:])dnl
                     75: pushdef([AC_CHECKING],[:])dnl
                     76: pushdef([AC_MSG_RESULT],[:])dnl
                     77: $1[]dnl
                     78: popdef([AC_MSG_RESULT])dnl
                     79: popdef([AC_CHECKING])dnl
                     80: popdef([AC_MSG_CHECKING])dnl
                     81: ])
                     82: 
                     83: dnl Expands to the "extern ..." prefix used for system declarations.
                     84: dnl AC_LANG_EXTERN()
                     85: AC_DEFUN([AC_LANG_EXTERN],
                     86: [extern
                     87: #ifdef __cplusplus
                     88: "C"
                     89: #endif
                     90: ])
                     91: 
                     92: AC_DEFUN([CL_CC_WORKS],
                     93: [AC_CACHE_CHECK(whether CC works at all, cl_cv_prog_cc_works, [
                     94: AC_LANG_SAVE()
                     95: AC_LANG_C()
                     96: AC_TRY_RUN([int main() { exit(0); }],
                     97: cl_cv_prog_cc_works=yes, cl_cv_prog_cc_works=no,
                     98: AC_TRY_LINK([], [], cl_cv_prog_cc_works=yes, cl_cv_prog_cc_works=no))
                     99: AC_LANG_RESTORE()
                    100: ])
                    101: case "$cl_cv_prog_cc_works" in
                    102:   *no) echo "Installation or configuration problem: C compiler cannot create executables."; exit 1;;
                    103:   *yes) ;;
                    104: esac
                    105: ])