-dnl @synopsis FP_READDIR_EOF_ERRNO
-dnl
-dnl Check what readdir() sets 'errno' to upon reaching
-dnl end of directory; not setting it is the correct thing to do,
-dnl but mingw based versions have set it to ENOENT until recently
-dnl (summer 2004).
-dnl
-dnl
-AC_DEFUN(FP_READDIR_EOF_ERRNO,
-[AC_CACHE_CHECK([what readdir sets errno to upon EOF], fptools_cv_readdir_eof_errno,
-[AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <dirent.h>
+# FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
+# --------------------------------------------------------
+# Assign VARIABLE the value of the compile-time EXPRESSION using INCLUDES for
+# compilation. Execute IF-FAILS when unable to determine the value. Works for
+# cross-compilation, too.
+#
+# Implementation note: We are lazy and use an internal autoconf macro, but it
+# is supported in autoconf versions 2.50 up to the actual 2.57, so there is
+# little risk.
+# The public AC_COMPUTE_INT macro isn't supported by some versions of
+# autoconf.
+AC_DEFUN([FP_COMPUTE_INT],
+[_AC_COMPUTE_INT([$2], [$1], [$3], [$4])[]dnl
+])# FP_COMPUTE_INT
+
+
+# FP_CHECK_CONST(EXPRESSION, [INCLUDES = DEFAULT-INCLUDES], [VALUE-IF-FAIL = -1])
+# -------------------------------------------------------------------------------
+# Defines CONST_EXPRESSION to the value of the compile-time EXPRESSION, using
+# INCLUDES. If the value cannot be determined, use VALUE-IF-FAIL.
+AC_DEFUN([FP_CHECK_CONST],
+[AS_VAR_PUSHDEF([fp_Cache], [fp_cv_const_$1])[]dnl
+AC_CACHE_CHECK([value of $1], fp_Cache,
+[FP_COMPUTE_INT(fp_check_const_result, [$1], [AC_INCLUDES_DEFAULT([$2])],
+ [fp_check_const_result=m4_default([$3], ['-1'])])
+AS_VAR_SET(fp_Cache, [$fp_check_const_result])])[]dnl
+AC_DEFINE_UNQUOTED(AS_TR_CPP([CONST_$1]), AS_VAR_GET(fp_Cache), [The value of $1.])[]dnl
+AS_VAR_POPDEF([fp_Cache])[]dnl
+])# FP_CHECK_CONST
+
+
+# FP_CHECK_CONSTS_TEMPLATE(EXPRESSION...)
+# ---------------------------------------
+# autoheader helper for FP_CHECK_CONSTS
+m4_define([FP_CHECK_CONSTS_TEMPLATE],
+[AC_FOREACH([fp_Const], [$1],
+ [AH_TEMPLATE(AS_TR_CPP(CONST_[]fp_Const),
+ [The value of ]fp_Const[.])])[]dnl
+])# FP_CHECK_CONSTS_TEMPLATE
+
+
+# FP_CHECK_CONSTS(EXPRESSION..., [INCLUDES = DEFAULT-INCLUDES], [VALUE-IF-FAIL = -1])
+# -----------------------------------------------------------------------------------
+# List version of FP_CHECK_CONST
+AC_DEFUN([FP_CHECK_CONSTS],
+[FP_CHECK_CONSTS_TEMPLATE([$1])dnl
+for fp_const_name in $1
+do
+FP_CHECK_CONST([$fp_const_name], [$2], [$3])
+done
+])# FP_CHECK_CONSTS
+
+
+dnl FPTOOLS_HTYPE_INCLUDES
+AC_DEFUN([FPTOOLS_HTYPE_INCLUDES],
+[
#include <stdio.h>
-#include <errno.h>
-int
-main(argc, argv)
-int argc;
-char **argv;
-{
- FILE *f=fopen("conftestval", "w");
-#if defined(__MINGW32__)
- int fd = mkdir("testdir");
+#include <stddef.h>
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+
+#if HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+
+#if HAVE_SIGNAL_H
+# include <signal.h>
+#endif
+
+#if HAVE_TIME_H
+# include <time.h>
+#endif
+
+#if HAVE_TERMIOS_H
+# include <termios.h>
+#endif
+
+#if HAVE_STRING_H
+# include <string.h>
+#endif
+
+#if HAVE_CTYPE_H
+# include <ctype.h>
+#endif
+
+#if HAVE_INTTYPES_H
+# include <inttypes.h>
#else
- int fd = mkdir("testdir", 0666);
+# if HAVE_STDINT_H
+# include <stdint.h>
+# endif
#endif
- DIR* dp;
- struct dirent* de;
- int err = 0;
-
- if (!f) return 1;
- if (fd == -1) {
- fprintf(stderr,"unable to create directory; quitting.\n");
- return 1;
- }
- close(fd);
- dp = opendir("testdir");
- if (!dp) {
- fprintf(stderr,"unable to browse directory; quitting.\n");
- rmdir("testdir");
- return 1;
- }
-
- /* the assumption here is that readdir() will only return NULL
- * due to reaching the end of the directory.
- */
- while (de = readdir(dp)) {
- ;
- }
- err = errno;
- fprintf(f,"%d", err);
- fclose(f);
- closedir(dp);
- rmdir("testdir");
- return 0;
-}]])],[fptools_cv_readdir_eof_errno=`cat conftestval`],[fptools_cv_readdir_eof_errno=bogus],[fptools_cv_readdir_eof_errno=0])])
-dnl the cross value is somewhat bogus.
-AC_DEFINE_UNQUOTED([READDIR_ERRNO_EOF], [$fptools_cv_readdir_eof_errno], [readdir() sets errno to this upon EOF])
+
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
+#include <stdlib.h>
])
-dnl @synopsis FP_DIRENT_FLAT_LAYOUT
-dnl
-dnl Check whether 'struct dirent' (in dirent.h) has d_name defined
-dnl as being the final field in a struct, or a pointer to somewhere
-dnl else. The former is the standardly thing to do, but mingw defns
-dnl have for the longest time gone for the latter. They no longer do,
-dnl hence the need to configure test for this.
-dnl
-dnl
-AC_DEFUN(FP_DIRENT_FLAT_LAYOUT,
-[AC_CACHE_CHECK([if struct dirent layout is flat], fptools_cv_dirent_flat_layout,
-[AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <dirent.h>
-#include <stdio.h>
-#include <string.h>
-int
-main(argc, argv)
-int argc;
-char **argv;
-{
- struct dirent de;
- /*
- * Check whether d_name is defined as
- * struct dirent { .... ; char d_name[..]; }
- * or
- * struct dirent { .... ; char* d_name; }
- *
- * Returns 0 if the former.
- */
- memset(&de,0,sizeof(struct dirent));
- return ((int)de.d_name == 0);
-}]])],[fptools_cv_dirent_flat_layout=yes],[fptools_cv_dirent_flat_layout=no],[fptools_cv_dirent_flat_layout=yes])])
-dnl the cross value is somewhat bogus.
-if test "$fptools_cv_dirent_flat_layout" = yes; then
-AC_DEFINE([STRUCT_DIRENT_FLAT_LAYOUT], [1], [Define to 1 if struct dirent is a flat structure])
-fi
+
+dnl ** Map an arithmetic C type to a Haskell type.
+dnl Based on autconf's AC_CHECK_SIZEOF.
+
+dnl FPTOOLS_CHECK_HTYPE_ELSE(TYPE, WHAT_TO_DO_IF_TYPE_DOES_NOT_EXIST)
+AC_DEFUN([FPTOOLS_CHECK_HTYPE_ELSE],[
+ changequote(<<, >>)
+ dnl The name to #define.
+ define(<<AC_TYPE_NAME>>, translit(htype_$1, [a-z *], [A-Z_P]))
+ dnl The cache variable names.
+ define(<<AC_CV_NAME>>, translit(fptools_cv_htype_$1, [ *], [_p]))
+ define(<<AC_CV_NAME_supported>>, translit(fptools_cv_htype_sup_$1, [ *], [_p]))
+ changequote([, ])
+
+ AC_MSG_CHECKING(Haskell type for $1)
+ AC_CACHE_VAL(AC_CV_NAME,[
+ AC_CV_NAME_supported=yes
+ FP_COMPUTE_INT([HTYPE_IS_INTEGRAL],
+ [(($1)((int)(($1)1.4))) == (($1)1.4)],
+ [FPTOOLS_HTYPE_INCLUDES],[AC_CV_NAME_supported=no])
+ if test "$AC_CV_NAME_supported" = "yes"
+ then
+ if test "$HTYPE_IS_INTEGRAL" -eq 0
+ then
+ FP_COMPUTE_INT([HTYPE_IS_FLOAT],[sizeof($1) == sizeof(float)],
+ [FPTOOLS_HTYPE_INCLUDES],
+ [AC_CV_NAME_supported=no])
+ FP_COMPUTE_INT([HTYPE_IS_DOUBLE],[sizeof($1) == sizeof(double)],
+ [FPTOOLS_HTYPE_INCLUDES],
+ [AC_CV_NAME_supported=no])
+ FP_COMPUTE_INT([HTYPE_IS_LDOUBLE],[sizeof($1) == sizeof(long double)],
+ [FPTOOLS_HTYPE_INCLUDES],
+ [AC_CV_NAME_supported=no])
+ if test "$HTYPE_IS_FLOAT" -eq 1
+ then
+ AC_CV_NAME=Float
+ elif test "$HTYPE_IS_DOUBLE" -eq 1
+ then
+ AC_CV_NAME=Double
+ elif test "$HTYPE_IS_LDOUBLE" -eq 1
+ then
+ AC_CV_NAME=LDouble
+ else
+ AC_CV_NAME_supported=no
+ fi
+ else
+ FP_COMPUTE_INT([HTYPE_IS_SIGNED],[(($1)(-1)) < (($1)0)],
+ [FPTOOLS_HTYPE_INCLUDES],
+ [AC_CV_NAME_supported=no])
+ FP_COMPUTE_INT([HTYPE_SIZE],[sizeof($1) * 8],
+ [FPTOOLS_HTYPE_INCLUDES],
+ [AC_CV_NAME_supported=no])
+ if test "$HTYPE_IS_SIGNED" -eq 0
+ then
+ AC_CV_NAME="Word$HTYPE_SIZE"
+ else
+ AC_CV_NAME="Int$HTYPE_SIZE"
+ fi
+ fi
+ fi
+ ])
+ if test "$AC_CV_NAME_supported" = yes; then
+ AC_MSG_RESULT($AC_CV_NAME)
+ AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME,
+ [Define to Haskell type for $1])
+ else
+ $2
+ fi
+ undefine([AC_TYPE_NAME])dnl
+ undefine([AC_CV_NAME])dnl
+ undefine([AC_CV_NAME_supported])dnl
+])
+
+dnl FPTOOLS_CHECK_HTYPE(TYPE)
+AC_DEFUN([FPTOOLS_CHECK_HTYPE],[
+ FPTOOLS_CHECK_HTYPE_ELSE([$1],[
+ AC_CV_NAME=NotReallyAType
+ AC_MSG_RESULT([not supported])
+ ])
+])
+
+
+# FP_SEARCH_LIBS_PROTO(WHAT, PROTOTYPE, FUNCTION, SEARCH-LIBS,
+# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
+# [OTHER-LIBRARIES])
+# --------------------------------------------------------
+# Search for a library defining FUNC, if it's not already available.
+# This is a copy of the AC_SEARCH_LIBS definition, but extended to take
+# the name of the thing we are looking for as its first argument, and
+# prototype text as its second argument. It also calls AC_LANG_PROGRAM
+# instead of AC_LANG_CALL
+AC_DEFUN([FP_SEARCH_LIBS_PROTO],
+[AS_VAR_PUSHDEF([ac_Search], [ac_cv_search_$1])dnl
+AC_CACHE_CHECK([for library containing $1], [ac_Search],
+[ac_func_search_save_LIBS=$LIBS
+AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
+for ac_lib in '' $4; do
+ if test -z "$ac_lib"; then
+ ac_res="none required"
+ else
+ ac_res=-l$ac_lib
+ LIBS="-l$ac_lib $7 $ac_func_search_save_LIBS"
+ fi
+ AC_LINK_IFELSE([], [AS_VAR_SET([ac_Search], [$ac_res])])
+ AS_VAR_SET_IF([ac_Search], [break])
+done
+AS_VAR_SET_IF([ac_Search], , [AS_VAR_SET([ac_Search], [no])])
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS])
+ac_res=AS_VAR_GET([ac_Search])
+AS_IF([test "$ac_res" != no],
+ [test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+ $5],
+ [$6])dnl
+AS_VAR_POPDEF([ac_Search])dnl
])
projects / ghc-base.git / blobdiff