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zz40-xc-ovr.m4: emit witness message in configure BODY

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This avoids witness message in output when running configure --help,
while sending the message to config.log for other configure runs.
This commit is contained in:
Yang Tse 2013-01-26 03:49:32 +01:00
parent d9c3505e83
commit 44cf225f7a
1 changed files with 36 additions and 3 deletions
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39
m4/zz40-xc-ovr.m4
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@ -327,9 +327,9 @@ AC_REQUIRE([_XC_CFG_PRE_BASIC_CHK_CMD_EXPR])dnl
AC_REQUIRE([_XC_CFG_PRE_BASIC_CHK_UTIL_SED])dnl
AC_REQUIRE([_XC_CFG_PRE_BASIC_CHK_UTIL_GREP])dnl
AC_REQUIRE([_XC_CFG_PRE_CHECK_PATH_SEPARATOR])dnl
echo "checking whether some basic commands and utilities are available... yes"
IFS=$xc_configure_preamble_prev_IFS
xc_configure_preamble_result='yes'
])
@ -449,6 +449,36 @@ m4_define([$0],[])dnl
])
dnl _XC_OVR_ZZ40_WITNESS
dnl -------------------------------------------------
dnl Private macro.
dnl
dnl Emits shell code that allows knowing wether macro
dnl XC_CONFIGURE_PREAMBLE has expanded before configure
dnl body begins, and if it has suceeded when configure
dnl finally runs. Results are recorded in config.log
AC_DEFUN([_XC_OVR_ZZ40_WITNESS],
[dnl
m4_divert_text([BODY],
[dnl
#
# Witness that XC_CONFIGURE_PREAMBLE has been used.
#
if test -z "$xc_configure_preamble_result"; then
AC_MSG_WARN([a macro expansion problem has been detected])
if test -z "$PATH_SEPARATOR"; then
AC_MSG_ERROR([variable 'PATH_SEPARATOR' not set (internal problem)])
fi
else
AC_MSG_CHECKING([whether some basic commands and utilities are available])
AC_MSG_RESULT([$xc_configure_preamble_result])
fi
])dnl
])
dnl XC_OVR_ZZ40
dnl -------------------------------------------------
dnl Placing a call to this macro in configure.ac will
@ -458,7 +488,8 @@ dnl provided elsewhere.
dnl
dnl This is the proper and intended way in which macro
dnl XC_CONFIGURE_PREAMBLE will expand early enough in
dnl generated configure script.
dnl generated configure script, as well as witness of
dnl its usage into configure body.
AC_DEFUN([XC_OVR_ZZ40],
[dnl
@ -487,6 +518,8 @@ AC_BEFORE([$0],[AC_CONFIG_HEADERS])dnl
AC_BEFORE([$0],[AC_CONFIG_MACRO_DIR])dnl
AC_BEFORE([$0],[AC_CONFIG_MACRO_DIRS])dnl
dnl
AC_REQUIRE([_XC_OVR_ZZ40_WITNESS])dnl
dnl
m4_pattern_forbid([^_*XC])dnl
m4_define([$0],[])dnl
])