configure: add macro to set arbitrary make variables
Add macro GIT_PARSE_WITH_SET_MAKE_VAR to configure.ac to allow --with style options that set values for variables used during the make process. Arguments are the $name part of --with-$name, the name of the variable to set in the Makefile (config.mak.autogen) and the help text for the option. Signed-off-by: Ben Walton <bwalton@artsci.utoronto.ca> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Ben Walton committed
Nov 4, 2009 at 13:05 UTC
d79d9e13375c43b8774b193ce725ac6c05b3865e
1 file changed
+20
configure.ac
+20
@@ -68,6 +68,26 @@ else \
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GIT_CONF_APPEND_LINE(${PACKAGE}DIR=$withval); \
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fi \
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])# GIT_PARSE_WITH
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+#
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+# GIT_PARSE_WITH_SET_MAKE_VAR(WITHNAME, VAR, HELP_TEXT)
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+# ---------------------
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+# Set VAR to the value specied by --with-WITHNAME.
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+# No verification of arguments is performed, but warnings are issued
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+# if either 'yes' or 'no' is specified.
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+# HELP_TEXT is presented when --help is called.
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+# This is a direct way to allow setting variables in the Makefile.
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+AC_DEFUN([GIT_PARSE_WITH_SET_MAKE_VAR],
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+[AC_ARG_WITH([$1],
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+ [AS_HELP_STRING([--with-$1=VALUE], $3)],
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+ if test -n "$withval"; then \
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+ if test "$withval" = "yes" -o "$withval" = "no"; then \
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+ AC_MSG_WARN([You likely do not want either 'yes' or 'no' as]
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+ [a value for $1 ($2). Maybe you do...?]); \
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+ fi; \
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+ \
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+ AC_MSG_NOTICE([Setting $2 to $withval]); \
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+ GIT_CONF_APPEND_LINE($2=$withval); \
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+ fi)])# GIT_PARSE_WITH_SET_MAKE_VAR
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dnl
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dnl GIT_CHECK_FUNC(FUNCTION, IFTRUE, IFFALSE)