Some replacements

[Francesco Salvestrini]

Hi all,

I was playing with the curl library some days ago while I stepped into the  
AC_CHECK_CURL on our archive. While playing with that macro I stepped into 
AC_CHECK_TAGLIB too.

Both macros seemed too similar at the first glance ... thus I started playing 
around them in order to make them converge into AC_PATH_GENERIC, instead of 
their hardwired version-comparison code.

AC_PATH_GENERIC sadly doesn't cope with 2 dotted version numbers (e.g.: the 
taglib version I have is 1.5) so ... I ended up fixing AC_PATH_GENERIC too.

Thus I found myself hacking them all while I had the idea of using 
AX_COMPARE_VERSION too (which is a really useful macro IMHO) ...

Since I wouldn't want to break working macro with that mess ... I ended up 
with the attached AX_PATH_GENERIC, AX_CHECK_CURL, AX_CHECK_TAGLIB and 
AX_CHECK_ORBIT2 (bonus ... :-P ).

These newer versions should have a better playground because:

1) AX_PATH_GENERIC relies on AX_COMPARE_VERSION (instead of hardwiring the 
version comparison code as in AC_PATH_GENERIC)

2) All the derived ones (AX_CHECK_CURL, AX_CHECK_TAGLIB and AX_ORBIT2) are 
one-liners now (thus ... less code to fix).

3) AX_PATH_GENERIC accepts a parameter more than AC_PATH_GENERIC, the 
SED-REGEXP-EXTRACTOR. That parameter should be used to purify the version 
number that a LIBRARY-config script could output ... thus more one-liners 
could came easily form LIBRARY-config scripts which outputs non-conventional 
version numbers (e.g.: 'Foo library v1.0.0 (GNU Bar package)' -> '1.0.0')

With the following configure.ac snippet:

AX_LIB_CURL([7],[
        echo "AAAAAAA"
],[
        echo "BBBBBBB"
])

AX_LIB_CURL([8],[
        echo "AAAAAAA"
],[
        echo "BBBBBBB"
])

AX_LIB_CURL([7],[
  AX_LIB_CURL([7.19],[
    AX_LIB_CURL([7.19.3],,[
            AC_MSG_ERROR([Your system lacks of libcurl >= 7.19.3])
    ])
  ],[
          AC_MSG_ERROR([Your system lacks of libcurl >= 7.19])
  ])
],[
        AC_MSG_ERROR([Your system lacks of libcurl >= 7])
])
AX_LIB_CURL([7.19.4],,[
        AC_MSG_ERROR([Your system lacks of libcurl >= 7.19.4])
])

AX_LIB_TAGLIB([1],,[
        AC_MSG_ERROR([Your system lacks of taglib >= 1])
])
AX_LIB_TAGLIB([1.5],,[
        AC_MSG_ERROR([Your system lacks of taglib >= 1.5])
])

AX_LIB_ORBIT2([2.10],,[
        AC_MSG_ERROR([Your system lacks of orbit2 >= 2.10])
])

AX_LIB_TAGLIB([1.6],,[
        AC_MSG_NOTICE([Your system lacks of taglib >= 1.6])
])
AX_LIB_TAGLIB([2],,[
        AC_MSG_ERROR([Your system lacks of taglib >= 2])
])

The macros output is as follows:

checking for curl-config... /usr/bin/curl-config
checking for curl (7.19.4) >= 7... yes
AAAAAAA
checking for curl-config... (cached) /usr/bin/curl-config
checking for curl (7.19.4) >= 8... no
BBBBBBB
checking for curl-config... (cached) /usr/bin/curl-config
checking for curl (7.19.4) >= 7... yes
checking for curl-config... (cached) /usr/bin/curl-config
checking for curl (7.19.4) >= 7.19... yes
checking for curl-config... (cached) /usr/bin/curl-config
checking for curl (7.19.4) >= 7.19.3... yes
checking for curl-config... (cached) /usr/bin/curl-config
checking for curl (7.19.4) >= 7.19.4... yes
checking for taglib-config... /usr/bin/taglib-config
checking for taglib (1.5) >= 1... yes
checking for taglib-config... (cached) /usr/bin/taglib-config
checking for taglib (1.5) >= 1.5... yes
checking for orbit2-config... /usr/bin/orbit2-config
checking for orbit2 (2.14.16) >= 2.10... yes
checking for taglib-config... (cached) /usr/bin/taglib-config
checking for taglib (1.5) >= 1.6... no
configure: Your system lacks of taglib >= 1.6
checking for taglib-config... (cached) /usr/bin/taglib-config
checking for taglib (1.5) >= 2... no
configure: error: Your system lacks of taglib >= 2

Have good night,
Francesco

-- 
"Nuclear war would really set back cable."
- Ted Turner

0004-New-ORBit2-related-macro-using-AX_PATH_GENERIC.patch
Description: Text Data

0003-Renewed-version-of-AC_CHECK_TAGLIB-using-AX_PATH_GEN.patch
Description: Text Data

0001-Rearranged-AC_PATH_GENERIC-in-order-to-use-AX_COMPAR.patch
Description: Text Data

0002-Renewed-version-of-AC_CHECK_CURL-using-AX_PATH_GENER.patch
Description: Text Data