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Yang Tse 5a053ffe80 build: fix circular header inclusion with other packages 
This commit renames lib/setup.h to lib/curl_setup.h and
renames lib/setup_once.h to lib/curl_setup_once.h.

Removes the need and usage of a header inclusion guard foreign
to libcurl. [1]

Removes the need and presence of an alarming notice we carried
in old setup_once.h [2]

----------------------------------------

1 - lib/setup_once.h used __SETUP_ONCE_H macro as header inclusion guard
    up to commit ec691ca3 which changed this to HEADER_CURL_SETUP_ONCE_H,
    this single inclusion guard is enough to ensure that inclusion of
    lib/setup_once.h done from lib/setup.h is only done once.

    Additionally lib/setup.h has always used __SETUP_ONCE_H macro to
    protect inclusion of setup_once.h even after commit ec691ca3, this
    was to avoid a circular header inclusion triggered when building a
    c-ares enabled version with c-ares sources available which also has
    a setup_once.h header. Commit ec691ca3 exposes the real nature of
    __SETUP_ONCE_H usage in lib/setup.h, it is a header inclusion guard
    foreign to libcurl belonging to c-ares's setup_once.h

    The renaming this commit does, fixes the circular header inclusion,
    and as such removes the need and usage of a header inclusion guard
    foreign to libcurl. Macro __SETUP_ONCE_H no longer used in libcurl.

2 - Due to the circular interdependency of old lib/setup_once.h and the
    c-ares setup_once.h header, old file lib/setup_once.h has carried
    back from 2006 up to now days an alarming and prominent notice about
    the need of keeping libcurl's and c-ares's setup_once.h in sync.

    Given that this commit fixes the circular interdependency, the need
    and presence of mentioned notice is removed.

    All mentioned interdependencies come back from now old days when
    the c-ares project lived inside a curl subdirectory. This commit
    removes last traces of such fact.
2013-01-09 00:49:50 +01:00
..
.gitignore configure: libtool 1.5 tweaks 2011-12-15 18:01:00 +01:00
curl-compilers.m4 configure: check if compiler halts on function prototype mismatch 2012-12-16 18:51:51 +01:00
curl-confopts.m4 configure: remove the --enable/disable-nonblocking options 2012-08-16 19:24:33 +02:00
curl-functions.m4 curl-functions.m4: improve gethostname arg 2 data type check 2012-12-17 16:31:24 +01:00
curl-openssl.m4 configure openssl version check: handle lack of L suffix 2011-09-28 23:09:46 +02:00
curl-override.m4 curl-override.m4: provide AC_CONFIG_MACRO_DIR definition conditionally 2013-01-01 17:26:32 +01:00
curl-reentrant.m4 build: fix circular header inclusion with other packages 2013-01-09 00:49:50 +01:00
curl-system.m4 remove the CVSish $Id$ lines 2010-03-24 11:02:54 +01:00
xc-translit.m4 xc-translit.m4 fix quoting 2011-06-21 00:03:44 +02:00
zz50-xc-ovr.m4 configure: libtool 1.5 tweaks 2011-12-15 18:01:00 +01:00