我正在考虑在使用log4cplus构建的项目中使用GNU Autotools。对于其他库依赖项(例如boost),我已经能够找到合理的规范M4宏来测试这些依赖项。
经过一番观察后,我仍无法为lib4cplus找到类似的股票宏。我知道我可能会自己制作,但在可能的情况下,“标准”版本更可取。有谁知道吗?
答案 0 :(得分:2)
log4cplus没有任何标准的Autoconf宏。如果你做了一些,我可以将它们添加到log4cplus包中。
但是log4cplus有pkg-config
个文件。尝试使用它:
PKG_PROG_PKG_CONFIG
PKG_CHECK_MODULES([log4cplus])
答案 1 :(得分:0)
这是我正在使用的内容,因为1.0.4中明显缺少pkg-config
支持。
我强烈建议未来的用户首先检查source repo,因为提供的宏可能会看到社区支持,而此版本则不会。
# log4cplus.m4: Autoconf macro to test for the presence and version of lib4cplus.
#
# SYNOPSIS
#
# LOG4CPLUS([MINIMUM-VERSION = 1.0.4])
#
# DESCRIPTION
#
# Test for the presence and version of the log4cplus logging library. Specifically, the
# log4cplus/logger.h header must be present, and a test program must link. The version check is
# preprocessor comparison against LOG4CPLUS_VERSION in version.h.
#
# If present, LOG4CPLUS_CPPFLAGS, LOG4CPLUS_LDFLAGS and LOG4CPLUS_LIBS affect preprocessor and
# linker behavior. If absent LOG4CPLUS_LIBS defaults to -llog4cplus.
#
# If a suitable library is found, HAVE_LOG4CPLUS is defined.
#
# EXAMPLE
#
# LOG4CPLUS([1.1.0])
#
AC_DEFUN([LOG4CPLUS], [
# We need sed to turn 1.0.4 into 1, 0, 4 below
AC_REQUIRE([AC_PROG_SED])
# Declare the LOG4CPLUS_* variables as "precious"
AC_ARG_VAR([LOG4CPLUS_CPPFLAGS], [preprocessor flags for log4cplus headers])
AC_ARG_VAR([LOG4CPLUS_LDFLAGS], [linker flags for log4cplus])
AC_ARG_VAR([LOG4CPLUS_LIBS], [libraries log4cplus])
# Supply a default LOG4CPLUS_LIBS if needed
AS_IF(
[test "x$LOG4CPLUS_LIBS" = "x"],
[LOG4CPLUS_LIBS=-llog4cplus])
# In a cache block..
AC_CACHE_VAL([log4cplus_cv_lib_log4cplus], [
# Back up CPPFLAGS, LDFLAGS & LIBS, declare we'll be testing in C++
save_CPPFLAGS="$CPPFLAGS"
save_LDFLAGS="$LDFLAGS"
save_LIBS="$LIBS"
AC_LANG_PUSH([C++])
# Append LOG4CPLUS_CPPFLAGS to CPPFLAGS if present
AS_IF(
[test "x$LOG4CPLUS_CPPFLAGS" != "x"],
[CPPFLAGS="$CPPFLAGS $LOG4CPLUS_CPPFLAGS"])
# Append LOG4CPLUS_LDFLAGS to LDFLAGS if present
AS_IF(
[test "x$LOG4CPLUS_LDFLAGS" != "x"],
[LDFLAGS="$LDFLAGS $LOG4CPLUS_LDFLAGS"])
# Append LOG4CPLUS_LIBS to LIBS if present
AS_IF(
[test "x$LOG4CPLUS_LIBS" != "x"],
[LIBS="$LIBS $LOG4CPLUS_LIBS"])
# If a minimum required version was specified, capture it in a variable.
# If not, assume 1.0.4
AS_IF([test "x$1" = "x"],
[min_version=1.0.4],
[min_version=$1])
# Format the minimum version in a way suitable for the LOG4CPLUS_MAKE_VERSION macro
min_version_commas=`echo $min_version | $SED -e 's/\./, /g'`
# Now the checks. Note that we try to avoid side-effects in this block, instead setting only
# the cache variable. Mutations come after. First, can we find a header?
AC_CHECK_HEADER([log4cplus/logger.h],
# Can we link against the library?
[AC_MSG_CHECKING([if log4cplus links])]
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <log4cplus/logger.h>]],
[[log4cplus::Logger logger]])],
[AC_MSG_RESULT([yes])]
# Is the present version new enough?
[AC_MSG_CHECKING([if log4cplus is version compatible])]
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <log4cplus/version.h>]], [[
#if LOG4CPLUS_MAKE_VERSION(]$min_version_commas[) <= LOG4CPLUS_VERSION
#else
error: version check failed.
#endif
]])],
[AC_MSG_RESULT([yes])]
[log4cplus_cv_lib_log4cplus=yes],
[AC_MSG_RESULT([no])]
[log4cplus_cv_lib_log4cplus=no])],
[AC_MSG_RESULT([no])]
[log4cplus_cv_lib_log4cplus=no])],
[log4cplus_cv_lib_log4cplus=no])
AC_LANG_POP([C++])
CPPFLAGS="$save_CPPFLAGS"
LDFLAGS="$save_LDFLAGS"
LIBS="$save_LIBS"
])
# Define HAVE_LOG4CPLUS if the check passed.
AS_IF([test "x$log4cplus_cv_lib_log4cplus" = "xyes"],
[AC_DEFINE([HAVE_LOG4CPLUS], [1], [Define to 1 if log4cplus is found])])
])