comment a bit the code in acinclude.m4
There is still a lot of code to clean up there, but hopefully this should clarify what goes on in there. git-svn-id: http://svn.digium.com/svn/asterisk/trunk@89448 f38db490-d61c-443f-a65b-d21fe96a405b
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acinclude.m4
110
acinclude.m4
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@ -1,3 +1,7 @@
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# Various support functions for configure.ac in asterisk
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#
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# Helper function to check for gcc attributes.
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# AST_GCC_ATTRIBUTE([attribute name])
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AC_DEFUN([AST_GCC_ATTRIBUTE],
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@ -11,35 +15,43 @@ AC_COMPILE_IFELSE(
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AC_MSG_RESULT(no))
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])
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# AST_EXT_LIB_SETUP([package symbol name], [package friendly name], [package option name], [additional help text])
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# Helper function to setup variables for a package.
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# $1 -> the package name. Used in configure.ac and also as a prefix
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# for the variables ($1_DIR, $1_INCLUDE, $1_LIB) in makeopts
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# $3 -> option name, used in --with-$3 or --without-$3 when calling configure.
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# $2 and $4 are just text describing the package (short and long form)
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# AST_EXT_LIB_SETUP([package], [short description], [configure option name], [long description])
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AC_DEFUN([AST_EXT_LIB_SETUP],
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[
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$1_DESCRIP="$2"
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$1_OPTION="$3"
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AC_ARG_WITH([$3], AC_HELP_STRING([--with-$3=PATH],[use $2 files in PATH $4]),[
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case ${withval} in
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n|no)
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USE_$1=no
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;;
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y|ye|yes)
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ac_mandatory_list="${ac_mandatory_list} $1"
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;;
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*)
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$1_DIR="${withval}"
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ac_mandatory_list="${ac_mandatory_list} $1"
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;;
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esac
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])
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PBX_$1=0
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AC_SUBST([$1_LIB])
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AC_SUBST([$1_INCLUDE])
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AC_SUBST([$1_DIR])
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AC_SUBST([PBX_$1])
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$1_DESCRIP="$2"
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$1_OPTION="$3"
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AC_ARG_WITH([$3], AC_HELP_STRING([--with-$3=PATH],[use $2 files in PATH $4]),
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[
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case ${withval} in
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n|no)
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USE_$1=no
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;;
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y|ye|yes)
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ac_mandatory_list="${ac_mandatory_list} $1"
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;;
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*)
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$1_DIR="${withval}"
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ac_mandatory_list="${ac_mandatory_list} $1"
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;;
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esac
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])
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PBX_$1=0
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AC_SUBST([$1_LIB])
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AC_SUBST([$1_INCLUDE])
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AC_SUBST([$1_DIR])
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AC_SUBST([PBX_$1])
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])
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# Check whether any of the mandatory modules are not present, and
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# print error messages in case.
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# print error messages in case. The mandatory list is built using
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# --with-* arguments when invoking configure.
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AC_DEFUN([AST_CHECK_MANDATORY],
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[
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@ -61,16 +73,22 @@ AC_DEFUN([AST_CHECK_MANDATORY],
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AC_MSG_RESULT(ok)
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])
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#-- The following two tests are only performed if PBX_$1 != 1,
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# so you can use multiple tests and stop at the first matching one.
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# On success, set PBX_$1 = 1, and also #define HAVE_$1 1
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# and #define HAVE_$1_VERSION ${last_argument} so you can tell which
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# test succeeded.
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# They should be called after AST_EXT_LIB_SETUP($1, ...)
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# The next three functions check for the availability of a given package.
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# AST_C_DEFINE_CHECK looks for the presence of a #define in a header file,
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# AST_EXT_LIB_CHECK looks for a symbol in a given library, or at least
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# for the presence of a header file.
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# AST_EXT_TOOL_CHECK looks for a symbol in using $1-config to determine CFLAGS and LIBS
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#
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# They are only run if PBX_$1 != 1 (where $1 is the package),
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# so you can call them multiple times and stop at the first matching one.
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# On success, they both set PBX_$1 = 1, set $1_INCLUDE and $1_LIB as applicable,
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# and also #define HAVE_$1 1 and #define HAVE_$1_VERSION ${last_argument}
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# in autoconfig.h so you can tell which test succeeded.
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# They should be called after AST_EXT_LIB_SETUP($1, ...)
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# Check if a given macro is defined in a certain header.
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# AST_C_DEFINE_CHECK([package symbol name], [macro name], [header file], [version])
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# AST_C_DEFINE_CHECK([package], [macro name], [header file], [version])
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AC_DEFUN([AST_C_DEFINE_CHECK],
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[
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if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
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@ -99,7 +117,7 @@ AC_DEFUN([AST_C_DEFINE_CHECK],
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# in a library, or, if no function is supplied, only check for the
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# existence of the header files.
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# AST_EXT_LIB_CHECK([package symbol name], [package library name], [function to check], [package header], [additional LIB data], [version])
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# AST_EXT_LIB_CHECK([package], [library], [function], [header], [additional LIB data], [version])
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AC_DEFUN([AST_EXT_LIB_CHECK],
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[
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if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
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@ -152,21 +170,22 @@ fi
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])
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# check for a tool using xxx-config
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# AST_EXT_TOOL_CHECK([package symbol name], [package library name], [symbol], [version])
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# Check for a package using $2-config. Similar to AST_EXT_LIB_CHECK,
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# but use $2-config to determine cflags and libraries to use.
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# AST_EXT_TOOL_CHECK([package], [tool name], [symbol], [version])
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AC_DEFUN([AST_EXT_TOOL_CHECK],
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[
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PBX_$1=0
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AC_CHECK_TOOL(CONFIG_$1, $2-config, No)
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if test ! "x${CONFIG_$1}" = xNo; then
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$1_INCLUDE=$(${CONFIG_$1} --cflags $3)
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$1_LIB=$(${CONFIG_$1} --libs $3)
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PBX_$1=1
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AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 libraries.])
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fi
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AC_SUBST(PBX_$1)
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AC_SUBST($1_INCLUDE)
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AC_SUBST($1_LIB)
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if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
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PBX_$1=0
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AC_CHECK_TOOL(CONFIG_$1, $2-config, No)
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if test ! "x${CONFIG_$1}" = xNo; then
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$1_INCLUDE=$(${CONFIG_$1} --cflags $3)
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$1_LIB=$(${CONFIG_$1} --libs $3)
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PBX_$1=1
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AC_DEFINE([HAVE_$1], 1, [Define if your system has the $1 libraries.])
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fi
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fi
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])
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AC_DEFUN(
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@ -830,7 +849,8 @@ dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
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dnl @version 2006-05-29
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dnl @license GPLWithACException
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AC_DEFUN([ACX_PTHREAD], [
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AC_DEFUN([ACX_PTHREAD],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_LANG_SAVE
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AC_LANG_C
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