acinclude.m4

   1 dnl From msw.
   2 dnl
   3 dnl a macro to check for ability to create python extensions
   4 dnl  AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
   5 dnl function also defines PYTHON_INCLUDES
   6 AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
   7 [AC_REQUIRE([AM_PATH_PYTHON])
   8 AC_MSG_CHECKING(for headers required to compile python extensions)
   9 dnl deduce PYTHON_INCLUDES
  10 py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
  11 py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
  12 PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
  13 if test "$py_prefix" != "$py_exec_prefix"; then
  14   PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
  15 fi
  16 AC_SUBST(PYTHON_INCLUDES)
  17 dnl check if the headers exist:
  18 save_CPPFLAGS="$CPPFLAGS"
  19 CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
  20 AC_TRY_CPP([#include <Python.h>],dnl
  21 [AC_MSG_RESULT(found)
  22 $1],dnl
  23 [AC_MSG_RESULT(not found)
  24 $2])
  25 CPPFLAGS="$save_CPPFLAGS"
  26 ])
  27
  28 dnl From ac-archive.
  29 dnl
  30 dnl @synopsis AC_CHECK_CC_OPT(flag, cachevarname)
  31 dnl
  32 dnl AC_CHECK_CC_OPT(-fvomit-frame,vomitframe)
  33 dnl would show a message as like
  34 dnl "checking wether gcc accepts -fvomit-frame ... no"
  35 dnl and sets the shell-variable $vomitframe to either "-fvomit-frame"
  36 dnl or (in this case) just a simple "". In many cases you would then call
  37 dnl AC_SUBST(_fvomit_frame_,$vomitframe) to create a substitution that
  38 dnl could be fed as "CFLAGS = @_funsigned_char_@ @_fvomit_frame_@
  39 dnl
  40 dnl in consequence this function is much more general than their
  41 dnl specific counterparts like ac_cxx_rtti.m4 that will test for
  42 dnl -fno-rtti -fno-exceptions
  43 dnl
  44 dnl @version $Id$
  45 dml @author  Guido Draheim <guidod@gmx.de>
  46
  47 AC_DEFUN(AC_CHECK_CC_OPT,
  48 [AC_CACHE_CHECK(whether ${CC-cc} accepts [$1], [$2],
  49 [AC_SUBST($2)
  50 echo 'void f(){}' > conftest.c
  51 if test -z "`${CC-cc} -c $1 conftest.c 2>&1`"; then
  52   $2="$1"
  53 else
  54   $2=""
  55 fi
  56 rm -f conftest*
  57 ])])
  58