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guile.m4: Add support for linking against guile with rpath.

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* guile.m4 (GUILE_FLAGS): Also set GUILE_LIBS and GUILE_LTLIBS. Fix
  documentation.
This commit is contained in:
Bruno Haible 2011-02-20 11:49:48 +01:00 • committed by Andy Wingo
parent 5ec48b7045
commit 1867d3e019
1 changed files with 35 additions and 8 deletions
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43
meta/guile.m4
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@ -70,29 +70,56 @@ AC_DEFUN([GUILE_PROGS],
#
# This macro runs the @code{guile-config} script, installed with Guile, to
# find out where Guile's header files and libraries are installed. It sets
# two variables, @var{GUILE_CFLAGS} and @var{GUILE_LDFLAGS}.
# four variables, @var{GUILE_CFLAGS}, @var{GUILE_LDFLAGS}, @var{GUILE_LIBS},
# and @var{GUILE_LTLIBS}.
#
# @var{GUILE_CFLAGS}: flags to pass to a C or C++ compiler to build code that
# uses Guile header files. This is almost always just a @code{-I} flag.
# uses Guile header files. This is almost always just one or more @code{-I}
# flags.
#
# @var{GUILE_LDFLAGS}: flags to pass to the linker to link a program against
# @var{GUILE_LDFLAGS}: flags to pass to the compiler to link a program against
# Guile. This includes @code{-lguile} for the Guile library itself, any
# libraries that Guile itself requires (like -lqthreads), and so on. It may
# also include a @code{-L} flag to tell the compiler where to find the
# libraries.
# also include one or more @code{-L} flag to tell the compiler where to find
# the libraries. But it does not include flags that influence the program's
# runtime search path for libraries, and will therefore lead to a program
# that fails to start, unless all necessary libraries are installed in a
# standard location such as @file{/usr/lib}.
#
# @var{GUILE_LIBS} and @var{GUILE_LTLIBS}: flags to pass to the compiler or to
# libtool, respectively, to link a program against Guile. It includes flags
# that augment the program's runtime search path for libraries, so that shared
# libraries will be found at the location where they were during linking, even
# in non-standard locations. @var{GUILE_LIBS} is to be used when linking the
# program directly with the compiler, whereas @var{GUILE_LTLIBS} is to be used
# when linking the program is done through libtool.
#
# The variables are marked for substitution, as by @code{AC_SUBST}.
#
AC_DEFUN([GUILE_FLAGS],
[AC_REQUIRE([GUILE_PROGS])dnl
[dnl Find guile-config.
AC_REQUIRE([GUILE_PROGS])dnl
AC_MSG_CHECKING([libguile compile flags])
GUILE_CFLAGS="`$GUILE_CONFIG compile`"
AC_MSG_RESULT([$GUILE_CFLAGS])
AC_MSG_CHECKING([libguile link flags])
GUILE_LDFLAGS="`$GUILE_CONFIG link`"
AC_MSG_RESULT([$GUILE_LDFLAGS])
AC_SUBST(GUILE_CFLAGS)
AC_SUBST(GUILE_LDFLAGS)
dnl Determine the platform dependent parameters needed to use rpath.
dnl AC_LIB_LINKFLAGS_FROM_LIBS is defined in gnulib/m4/lib-link.m4 and needs
dnl the file gnulib/build-aux/config.rpath.
AC_LIB_LINKFLAGS_FROM_LIBS([GUILE_LIBS], [$GUILE_LDFLAGS], [])
GUILE_LIBS="$GUILE_LDFLAGS $GUILE_LIBS"
AC_LIB_LINKFLAGS_FROM_LIBS([GUILE_LTLIBS], [$GUILE_LDFLAGS], [yes])
GUILE_LTLIBS="$GUILE_LDFLAGS $GUILE_LTLIBS"
AC_SUBST([GUILE_CFLAGS])
AC_SUBST([GUILE_LDFLAGS])
AC_SUBST([GUILE_LIBS])
AC_SUBST([GUILE_LTLIBS])
])
# GUILE_SITE_DIR -- find path to Guile "site" directory