[RFC/PATCH 14] autoconf: Added --with/--without for openssl, curl, expat to ./configure

[Jakub Narebski <jnareb@gmail.com>]

Added --with-PACKAGE[=PATH] (where PATH is prefix for PACKAGE
libraries and includes) and --without-PACKAGE (--with-PACKAGE=no)
support for curl, openssl, expat to configure.ac

Signed-off-by: Jakub Narebski <jnareb@gmail.com>

---

I'm not autoconf/m4 expert: could anyone tell me how to uppercase
PACKAGE name, so one could write MY_PARSE_WITH(openssl)?

How to add [=PATH] to --with-PACKAGE option description in a way
which does not screw up AS_HELP_WITH calculations. I could use
@<:@=PATH@:>@ which transforms to [=PATH], but AS_HELP_WITH counts
number of characters in source I think.

 configure.ac |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index fcfc9ce..26d6f4d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,22 @@ # Append LINE to file ${config_append}
 AC_DEFUN([MY_APPEND_LINE],
 [[echo "$1" >> "${config_append}"]])# MY_APPEND_LINE
 
+# MY_PARSE_WITH(PACKAGE)
+# ----------------------
+# For use in AC_ARG_WITH action-if-found, for packages default ON. 
+# * Set NO_PACKAGE=YesPlease  for --without-PACKAGE
+# * Set PACKAGEDIR=ARG for --with-PACKAGE=ARG
+# * Do nothing for --with-PACKAGE without ARG
+# PACKAGE option must be all uppercase
+AC_DEFUN([MY_PARSE_WITH],
+[[if test "$withval" = "no"; then \
+    MY_APPEND_LINE(NO_$1=YesPlease); \
+  elif test "$withval" != "yes"; then \
+    MY_APPEND_LINE($1DIR=$withval); \
+  fi; \
+]])# MY_PARSE_WITH
+
+
 # Checks for libraries.
 AC_MSG_NOTICE([CHECKS for libraries])
 AC_CHECK_LIB([crypto], [SHA1_Init],,MY_APPEND_LINE(NO_OPENSSL=YesPlease))
@@ -48,6 +64,24 @@ AC_CHECK_FUNC(strlcpy,,MY_APPEND_LINE(NO
 AC_CHECK_FUNC(setenv,,MY_APPEND_LINE(NO_SETENV=YesPlease))
 
 
+# Site configuration
+AC_MSG_NOTICE([CHECKS for site configuration])
+AC_ARG_WITH(curl, 
+AS_HELP_STRING([--with-curl],[support http(s):// transports (default is YES)])
+AS_HELP_STRING([],           [ARG can be also prefix for curl library and headers]),\
+MY_PARSE_WITH(CURL))
+
+AC_ARG_WITH(openssl,
+AS_HELP_STRING([--with-openssl],[use OpenSSL library (default is YES)])
+AS_HELP_STRING([],              [ARG can be prefix for openssl library and headers]),\
+MY_PARSE_WITH(OPENSSL))
+
+AC_ARG_WITH(expat,
+AS_HELP_STRING([--with-expat],[support git-push using http:// and https:// transports via WebDAV (default is YES)])
+AS_HELP_STRING([],            [ARG can be also prefix for expat library and headers]),\
+MY_PARSE_WITH(EXPAT))
+
+
 # Output files
 AC_CONFIG_FILES(["${config_file}":"${config_in}":"${config_append}"])
 AC_OUTPUT
-- 
1.4.0