acspecific.m4

这是一个自动生成MAKEFILE的工具。在LINUX工程项目里是很好的帮手。希望对大家有点帮助。

fi
])

dnl Define SET_MAKE to set ${MAKE} if make doesn't.
AC_DEFUN(AC_PROG_MAKE_SET,
[AC_MSG_CHECKING(whether ${MAKE-make} sets \${MAKE})
set dummy ${MAKE-make}; ac_make=`echo "[$]2" | sed 'y%./+-%__p_%'`
AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
[cat > conftestmake <<\EOF
all:
	@echo 'ac_maketemp="${MAKE}"'
EOF
changequote(, )dnl
# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
changequote([, ])dnl
if test -n "$ac_maketemp"; then
  eval ac_cv_prog_make_${ac_make}_set=yes
else
  eval ac_cv_prog_make_${ac_make}_set=no
fi
rm -f conftestmake])dnl
if eval "test \"`echo '$ac_cv_prog_make_'${ac_make}_set`\" = yes"; then
  AC_MSG_RESULT(yes)
  SET_MAKE=
else
  AC_MSG_RESULT(no)
  SET_MAKE="MAKE=${MAKE-make}"
fi
AC_SUBST([SET_MAKE])dnl
])

AC_DEFUN(AC_PROG_RANLIB,
[AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])

dnl Check for mawk first since it's generally faster.
AC_DEFUN(AC_PROG_AWK,
[AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])

AC_DEFUN(AC_PROG_YACC,
[AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])

AC_DEFUN(AC_PROG_CPP,
[AC_MSG_CHECKING(how to run the C preprocessor)
# On Suns, sometimes $CPP names a directory.
if test -n "$CPP" && test -d "$CPP"; then
  CPP=
fi
if test -z "$CPP"; then
AC_CACHE_VAL(ac_cv_prog_CPP,
[  # This must be in double quotes, not single quotes, because CPP may get
  # substituted into the Makefile and "${CC-cc}" will confuse make.
  CPP="${CC-cc} -E"
  # On the NeXT, cc -E runs the code through the compiler's parser,
  # not just through cpp.
dnl Use a header file that comes with gcc, so configuring glibc
dnl with a fresh cross-compiler works.
  AC_TRY_CPP([#include <assert.h>
Syntax Error], ,
  CPP="${CC-cc} -E -traditional-cpp"
  AC_TRY_CPP([#include <assert.h>
Syntax Error], ,
  CPP="${CC-cc} -nologo -E"
  AC_TRY_CPP([#include <assert.h>
Syntax Error], , CPP=/lib/cpp)))
  ac_cv_prog_CPP="$CPP"])dnl
  CPP="$ac_cv_prog_CPP"
else
  ac_cv_prog_CPP="$CPP"
fi
AC_MSG_RESULT($CPP)
AC_SUBST(CPP)dnl
])

AC_DEFUN(AC_PROG_CXXCPP,
[AC_MSG_CHECKING(how to run the C++ preprocessor)
if test -z "$CXXCPP"; then
AC_CACHE_VAL(ac_cv_prog_CXXCPP,
[AC_LANG_SAVE[]dnl
AC_LANG_CPLUSPLUS[]dnl
  CXXCPP="${CXX-g++} -E"
  AC_TRY_CPP([#include <stdlib.h>], , CXXCPP=/lib/cpp)
  ac_cv_prog_CXXCPP="$CXXCPP"
AC_LANG_RESTORE[]dnl
fi])dnl
CXXCPP="$ac_cv_prog_CXXCPP"
AC_MSG_RESULT($CXXCPP)
AC_SUBST(CXXCPP)dnl
])

dnl Require finding the C or C++ preprocessor, whichever is the
dnl current language.
AC_DEFUN(AC_REQUIRE_CPP,
[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])

AC_DEFUN(AC_PROG_LEX,
[AC_CHECK_PROG(LEX, flex, flex, lex)
if test -z "$LEXLIB"
then
  case "$LEX" in
  flex*) ac_lib=fl ;;
  *) ac_lib=l ;;
  esac
  AC_CHECK_LIB($ac_lib, yywrap, LEXLIB="-l$ac_lib")
fi
AC_SUBST(LEXLIB)])

dnl Check if lex declares yytext as a char * by default, not a char[].
undefine([AC_DECL_YYTEXT])
AC_DEFUN(AC_DECL_YYTEXT,
[AC_REQUIRE_CPP()dnl
AC_REQUIRE([AC_PROG_LEX])dnl
AC_CACHE_CHECK(lex output file root, ac_cv_prog_lex_root,
[# The minimal lex program is just a single line: %%.  But some broken lexes
# (Solaris, I think it was) want two %% lines, so accommodate them.
echo '%%
%%' | $LEX
if test -f lex.yy.c; then
  ac_cv_prog_lex_root=lex.yy
elif test -f lexyy.c; then
  ac_cv_prog_lex_root=lexyy
else
  AC_MSG_ERROR(cannot find output from $LEX; giving up)
fi])
LEX_OUTPUT_ROOT=$ac_cv_prog_lex_root
AC_SUBST(LEX_OUTPUT_ROOT)dnl

AC_CACHE_CHECK(whether yytext is a pointer, ac_cv_prog_lex_yytext_pointer,
[# POSIX says lex can declare yytext either as a pointer or an array; the
# default is implementation-dependent. Figure out which it is, since
# not all implementations provide the %pointer and %array declarations.
ac_cv_prog_lex_yytext_pointer=no
echo 'extern char *yytext;' >>$LEX_OUTPUT_ROOT.c
ac_save_LIBS="$LIBS"
LIBS="$LIBS $LEXLIB"
AC_TRY_LINK(`cat $LEX_OUTPUT_ROOT.c`, , ac_cv_prog_lex_yytext_pointer=yes)
LIBS="$ac_save_LIBS"
rm -f "${LEX_OUTPUT_ROOT}.c"
])
dnl
if test $ac_cv_prog_lex_yytext_pointer = yes; then
  AC_DEFINE(YYTEXT_POINTER)
fi
])

AC_DEFUN(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Find a good install program.  We prefer a C program (faster),
# so one script is as good as another.  But avoid the broken or
# incompatible versions:
# SysV /etc/install, /usr/sbin/install
# SunOS /usr/etc/install
# IRIX /sbin/install
# AIX /bin/install
# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
# AFS /usr/afsws/bin/install, which mishandles nonexistent args
# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
# ./install, which can be erroneously created by make from ./install.sh.
AC_MSG_CHECKING(for a BSD compatible install)
if test -z "$INSTALL"; then
AC_CACHE_VAL(ac_cv_path_install,
[  IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS=":"
  for ac_dir in $PATH; do
    # Account for people who put trailing slashes in PATH elements.
    case "$ac_dir/" in
    /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
    *)
      # OSF1 and SCO ODT 3.0 have their own names for install.
      # Don't use installbsd from OSF since it installs stuff as root
      # by default.
      for ac_prog in ginstall scoinst install; do
        if test -f $ac_dir/$ac_prog; then
	  if test $ac_prog = install &&
            grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
	    # AIX install.  It has an incompatible calling convention.
	    :
	  else
	    ac_cv_path_install="$ac_dir/$ac_prog -c"
	    break 2
	  fi
	fi
      done
      ;;
    esac
  done
  IFS="$ac_save_IFS"
])dnl
  if test "${ac_cv_path_install+set}" = set; then
    INSTALL="$ac_cv_path_install"
  else
    # As a last resort, use the slow shell script.  We don't cache a
    # path for INSTALL within a source directory, because that will
    # break other packages using the cache if that directory is
    # removed, or if the path is relative.
    INSTALL="$ac_install_sh"
  fi
fi
dnl We do special magic for INSTALL instead of AC_SUBST, to get
dnl relative paths right.
AC_MSG_RESULT($INSTALL)

# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
# It thinks the first close brace ends the variable substitution.
test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
AC_SUBST(INSTALL_PROGRAM)dnl

test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
AC_SUBST(INSTALL_SCRIPT)dnl

test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
AC_SUBST(INSTALL_DATA)dnl
])

AC_DEFUN(AC_PROG_LN_S,
[AC_MSG_CHECKING(whether ln -s works)
AC_CACHE_VAL(ac_cv_prog_LN_S,
[rm -f conftestdata
if ln -s X conftestdata 2>/dev/null
then
  rm -f conftestdata
  ac_cv_prog_LN_S="ln -s"
else
  ac_cv_prog_LN_S=ln
fi])dnl
LN_S="$ac_cv_prog_LN_S"
if test "$ac_cv_prog_LN_S" = "ln -s"; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_SUBST(LN_S)dnl
])

define(AC_RSH,
[errprint(__file__:__line__: [$0] has been removed; replace it with equivalent code
)m4exit(4)])


dnl ### Checks for header files


AC_DEFUN(AC_HEADER_STDC,
[AC_REQUIRE_CPP()dnl
AC_CACHE_CHECK(for ANSI C header files, ac_cv_header_stdc,
[AC_TRY_CPP([#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)

if test $ac_cv_header_stdc = yes; then
  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
AC_EGREP_HEADER(memchr, string.h, , ac_cv_header_stdc=no)
fi

if test $ac_cv_header_stdc = yes; then
  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
AC_EGREP_HEADER(free, stdlib.h, , ac_cv_header_stdc=no)
fi

if test $ac_cv_header_stdc = yes; then
  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TRY_RUN([#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
int main () { int i; for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
exit (0); }
], , ac_cv_header_stdc=no, :)
fi])
if test $ac_cv_header_stdc = yes; then
  AC_DEFINE(STDC_HEADERS)
fi
])

AC_DEFUN(AC_UNISTD_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])dnl
AC_CHECK_HEADER(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])

AC_DEFUN(AC_USG,
[AC_OBSOLETE([$0],
  [; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])dnl
AC_MSG_CHECKING([for BSD string and memory functions])
AC_TRY_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);],
  [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no); AC_DEFINE(USG)])])


dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
dnl To avoid problems, don't check for gcc2 built-ins.
AC_DEFUN(AC_MEMORY_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])dnl
AC_MSG_CHECKING(whether string.h declares mem functions)
AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no)
AC_MSG_RESULT($ac_found)
if test $ac_found = no; then
  AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)])
fi
])

AC_DEFUN(AC_HEADER_MAJOR,
[AC_CACHE_CHECK(whether sys/types.h defines makedev,
  ac_cv_header_sys_types_h_makedev,
[AC_TRY_LINK([#include <sys/types.h>], [return makedev(0, 0);],
  ac_cv_header_sys_types_h_makedev=yes, ac_cv_header_sys_types_h_makedev=no)
])

if test $ac_cv_header_sys_types_h_makedev = no; then
AC_CHECK_HEADER(sys/mkdev.h, [AC_DEFINE(MAJOR_IN_MKDEV)])

  if test $ac_cv_header_sys_mkdev_h = no; then
AC_CHECK_HEADER(sys/sysmacros.h, [AC_DEFINE(MAJOR_IN_SYSMACROS)])
  fi
fi
])

AC_DEFUN(AC_HEADER_DIRENT,
[ac_header_dirent=no
AC_CHECK_HEADERS_DIRENT(dirent.h sys/ndir.h sys/dir.h ndir.h,
  [ac_header_dirent=$ac_hdr; break])
# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
if test $ac_header_dirent = dirent.h; then
AC_CHECK_LIB(dir, opendir, LIBS="$LIBS -ldir")
else
AC_CHECK_LIB(x, opendir, LIBS="$LIBS -lx")
fi
])

dnl Like AC_CHECK_HEADER, except also make sure that HEADER-FILE
dnl defines the type `DIR'.  dirent.h on NextStep 3.2 doesn't.
dnl AC_CHECK_HEADER_DIRENT(HEADER-FILE, ACTION-IF-FOUND)
AC_DEFUN(AC_CHECK_HEADER_DIRENT,
[ac_safe=`echo "$1" | sed 'y%./+-%__p_%'`
AC_MSG_CHECKING([for $1 that defines DIR])
AC_CACHE_VAL(ac_cv_header_dirent_$ac_safe,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <$1>], [DIR *dirp = 0;],
  eval "ac_cv_header_dirent_$ac_safe=yes",
  eval "ac_cv_header_dirent_$ac_safe=no")])dnl
if eval "test \"`echo '$ac_cv_header_dirent_'$ac_safe`\" = yes"; then
  AC_MSG_RESULT(yes)
  $2
else
  AC_MSG_RESULT(no)
fi
])

dnl Like AC_CHECK_HEADERS, except succeed only for a HEADER-FILE that
dnl defines `DIR'.
dnl AC_CHECK_HEADERS_DIRENT(HEADER-FILE... [, ACTION])
define(AC_CHECK_HEADERS_DIRENT,
[for ac_hdr in $1
do
AC_CHECK_HEADER_DIRENT($ac_hdr,
[changequote(, )dnl
  ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
changequote([, ])dnl
  AC_DEFINE_UNQUOTED($ac_tr_hdr) $2])dnl
done])

AC_DEFUN(AC_DIR_HEADER,
[AC_OBSOLETE([$0], [; instead use AC_HEADER_DIRENT])dnl
ac_header_dirent=no
for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
  AC_CHECK_HEADER_DIRENT($ac_hdr, [ac_header_dirent=$ac_hdr; break])
done

case "$ac_header_dirent" in
dirent.h) AC_DEFINE(DIRENT) ;;
sys/ndir.h) AC_DEFINE(SYSNDIR) ;;
sys/dir.h) AC_DEFINE(SYSDIR) ;;
ndir.h) AC_DEFINE(NDIR) ;;
esac

AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
[AC_TRY_RUN([#include <sys/types.h>
#include <$ac_header_dirent>
int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
  ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes, ac_cv_func_closedir_void=yes)])
if test $ac_cv_func_closedir_void = yes; then
  AC_DEFINE(VOID_CLOSEDIR)
fi
])

AC_DEFUN(AC_HEADER_STAT,
[AC_CACHE_CHECK(whether stat file-mode macros are broken,
  ac_cv_header_stat_broken,
[AC_EGREP_CPP([You lose], [#include <sys/types.h>
#include <sys/stat.h>

#if defined(S_ISBLK) && defined(S_IFDIR)
# if S_ISBLK (S_IFDIR)
You lose.
# endif
#endif

#if defined(S_ISBLK) && defined(S_IFCHR)
# if S_ISBLK (S_IFCHR)
You lose.
# endif
#endif

#if defined(S_ISLNK) && defined(S_IFREG)
# if S_ISLNK (S_IFREG)
You lose.
# endif
#endif

#if defined(S_ISSOCK) && defined(S_IFREG)
# if S_ISSOCK (S_IFREG)
You lose.
# endif
#endif
], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])
if test $ac_cv_header_stat_broken = yes; then
  AC_DEFINE(STAT_MACROS_BROKEN)
fi
])

AC_DEFUN(AC_DECL_SYS_SIGLIST,
[AC_CACHE_CHECK([for sys_siglist declaration in signal.h or unistd.h],
  ac_cv_decl_sys_siglist,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h.  */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif], [char *msg = *(sys_siglist + 1);],
  ac_cv_decl_sys_siglist=yes, ac_cv_decl_sys_siglist=no)])
if test $ac_cv_decl_sys_siglist = yes; then
  AC_DEFINE(SYS_SIGLIST_DECLARED)
fi
])

AC_DEFUN(AC_HEADER_SYS_WAIT,
[AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible],
  ac_cv_header_sys_wait_h,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/wait.h>
#ifndef WEXITSTATUS
#define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
#endif
#ifndef WIFEXITED
#define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif], [int s;
wait (&s);
s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;],