Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

208 lines (182 sloc) 5.742 kb
# AX_CPP_IDENT
# ------------
# Check if the C compiler supports #ident
# Define and substitute ident_support if so.
#
# It would be simpler and more consistent with the rest of the autoconf
# structure to AC_DEFINE(HAVE_CPP_IDENT) instead of
# ident_support='-DHAVE_CVS_IDENT=1' and AC_SUBST(ident_support), but that
# change would require all C files in the icarus top level directory to
# put #include <config.h> before the #ifdef HAVE_CVS_IDENT (and change
# HAVE_CVS_IDENT to HAVE_CPP_IDENT). That would also remove all special
# ident_support handling from the Makefile. Manyana.
#
AC_DEFUN([AX_CPP_IDENT],
[AC_CACHE_CHECK([for ident support in C compiler], ax_cv_cpp_ident,
[AC_TRY_COMPILE([
#ident "$Id: aclocal.m4,v 1.7 2007/05/16 23:59:12 steve Exp $"
],[while (0) {}],
[AS_VAR_SET(ax_cv_cpp_ident, yes)],
[AS_VAR_SET(ax_cv_cpp_ident, no)])])
if test $ax_cv_cpp_ident = yes; then
ident_support='-DHAVE_CVS_IDENT=1'
fi
AC_SUBST(ident_support)
])# AC_CPP_IDENT
# _AX_C_UNDERSCORES_MATCH_IFELSE(PATTERN, ACTION-IF-MATCH, ACTION-IF-NOMATCH)
# ------------------------------
# Sub-macro for AX_C_UNDERSCORES_LEADING and AX_C_UNDERSCORES_TRAILING.
# Unwarranted assumptions:
# - the object file produced by AC_COMPILE_IFELSE is called "conftest.$ac_objext"
# - the nm(1) utility is available, and its name is "nm".
AC_DEFUN([_AX_C_UNDERSCORES_MATCH_IF],
[AC_COMPILE_IFELSE([void underscore(void){}],
[AS_IF([nm conftest.$ac_objext|grep $1 >/dev/null 2>/dev/null],[$2],[$3])],
[AC_MSG_ERROR([underscore test crashed])]
)])
# AX_C_UNDERSCORES_LEADING
# ---------------------------------
# Check if symbol names in object files produced by C compiler have
# leading underscores. Define NEED_LU if so.
AC_DEFUN([AX_C_UNDERSCORES_LEADING],
[AC_CACHE_CHECK([for leading underscores], ax_cv_c_underscores_leading,
[_AX_C_UNDERSCORES_MATCH_IF([_underscore],
[AS_VAR_SET(ax_cv_c_underscores_leading, yes)],
[AS_VAR_SET(ax_cv_c_underscores_leading, no)])])
if test $ax_cv_c_underscores_leading = yes -a "$CYGWIN" != "yes" -a "$MINGW32" != "yes"; then
AC_DEFINE([NEED_LU], [1], [Symbol names in object files produced by C compiler have leading underscores.])
fi
])# AX_C_UNDERSCORES_LEADING
# AX_C_UNDERSCORES_TRAILING
# ---------------------------------
# Check if symbol names in object files produced by C compiler have
# trailing underscores. Define NEED_TU if so.
AC_DEFUN([AX_C_UNDERSCORES_TRAILING],
[AC_CACHE_CHECK([for trailing underscores], ax_cv_c_underscores_trailing,
[_AX_C_UNDERSCORES_MATCH_IF([underscore_],
[AS_VAR_SET(ax_cv_c_underscores_trailing, yes)],
[AS_VAR_SET(ax_cv_c_underscores_trailing, no)])])
if test $ax_cv_c_underscores_trailing = yes; then
AC_DEFINE([NEED_TU], [1], [Symbol names in object files produced by C compiler have trailing underscores.])
fi
])# AX_C_UNDERSCORES_TRAILING
# AX_WIN32
# --------
# Combined check for several flavors of Microsoft Windows so
# their "issues" can be dealt with
AC_DEFUN([AX_WIN32],
[AC_CYGWIN
AC_MINGW32
WIN32=no
AC_MSG_CHECKING([for Microsoft Windows])
if test "$CYGWIN" = "yes" -o "$MINGW32" = "yes"
then
WIN32=yes
fi
AC_SUBST(MINGW32)
AC_SUBST(WIN32)
AC_MSG_RESULT($WIN32)
])# AX_WIN32
# AX_LD_EXTRALIBS
# ---------------
# mingw needs to link with libiberty.a, but cygwin alone can't tolerate it
AC_DEFUN([AX_LD_EXTRALIBS],
[AC_MSG_CHECKING([for extra libs needed])
EXTRALIBS=
case "${host}" in
*-*-cygwin* )
if test "$MINGW32" = "yes"; then
EXTRALIBS="-liberty"
fi
;;
esac
AC_SUBST(EXTRALIBS)
AC_MSG_RESULT($EXTRALIBS)
])# AX_LD_EXTRALIBS
# AX_LD_SHAREDLIB_OPTS
# --------------------
# linker options when building a shared library
AC_DEFUN([AX_LD_SHAREDLIB_OPTS],
[AC_MSG_CHECKING([for shared library link flag])
shared=-shared
case "${host}" in
*-*-cygwin*)
shared="-shared -Wl,--enable-auto-image-base"
;;
*-*-hpux*)
shared="-b"
;;
*-*-darwin1.[0123])
shared="-bundle -undefined suppress"
;;
*-*-darwin*)
shared="-bundle -undefined suppress -flat_namespace"
;;
esac
AC_SUBST(shared)
AC_MSG_RESULT($shared)
])# AX_LD_SHAREDLIB_OPTS
# AX_C_PICFLAG
# ------------
# The -fPIC flag is used to tell the compiler to make position
# independent code. It is needed when making shared objects.
AC_DEFUN([AX_C_PICFLAG],
[AC_MSG_CHECKING([for flag to make position independent code])
PICFLAG=-fPIC
case "${host}" in
*-*-cygwin*)
PICFLAG=
;;
*-*-hpux*)
PICFLAG=+z
;;
esac
AC_SUBST(PICFLAG)
AC_MSG_RESULT($PICFLAG)
])# AX_C_PICFLAG
# AX_LD_RDYNAMIC
# --------------
# The -rdynamic flag is used by iverilog when compiling the target,
# to know how to export symbols of the main program to loadable modules
# that are brought in by -ldl
AC_DEFUN([AX_LD_RDYNAMIC],
[AC_MSG_CHECKING([for -rdynamic compiler flag])
rdynamic=-rdynamic
case "${host}" in
*-*-netbsd*)
rdynamic="-Wl,--export-dynamic"
;;
*-*-openbsd*)
rdynamic="-Wl,--export-dynamic"
;;
*-*-solaris*)
rdynamic=""
;;
*-*-cygwin*)
rdynamic=""
;;
*-*-hpux*)
rdynamic="-E"
;;
*-*-darwin*)
rdynamic="-Wl,-all_load"
strip_dynamic="-SX"
;;
esac
AC_SUBST(rdynamic)
AC_MSG_RESULT($rdynamic)
AC_SUBST(strip_dynamic)
# since we didn't tell them we're "checking", no good place to tell the answer
# AC_MSG_RESULT($strip_dynamic)
])# AX_LD_RDYNAMIC
# AX_CPP_PRECOMP
# --------------
AC_DEFUN([AX_CPP_PRECOMP],
[# Darwin requires -no-cpp-precomp
case "${host}" in
*-*-darwin*)
CPPFLAGS="-no-cpp-precomp $CPPFLAGS"
CFLAGS="-no-cpp-precomp $CFLAGS"
;;
esac
])# AX_CPP_PRECOMP
Jump to Line
Something went wrong with that request. Please try again.