• Ralf Wildenhues's avatar
    configure: use AC_LANG_PROGRAM consistently · 1e58dba1
    Ralf Wildenhues authored
    Avoid warnings from Autoconf 2.68 about missing use of AC_LANG_PROGRAM
    and friends.
    
    Quoting autoconf-2.68/NEWS:
    
      ** The macros AC_PREPROC_IFELSE, AC_COMPILE_IFELSE, AC_LINK_IFELSE, and
         AC_RUN_IFELSE now warn if the first argument failed to use
         AC_LANG_SOURCE or AC_LANG_PROGRAM to generate the conftest file
         contents.  A new macro AC_LANG_DEFINES_PROVIDED exists if you have
         a compelling reason why you cannot use AC_LANG_SOURCE but must
         avoid the warning.
    
    The underlying reason for that change is that AC_LANG_{SOURCE,PROGRAM}
    take care to supply the previously computed set of #defines (and
    include standard headers if so desired) for preprocessed languages
    like C and C++.
    
    In some cases, AC_LANG_PROGRAM is already used but not sufficiently
    m4-quoted, so we just need to add another set of [quotes] to prevent
    the autoconf warning from being triggered bogusly.  Quoting all
    arguments (except when calling special macros that need to be expanded
    before recursion) is better style, anyway.  These and more rules are
    described in detail in 'info Autoconf "Programming in M4"'.
    
    No change in the resulting config.mak.autogen after running
    ./configure intended.
    Signed-off-by: default avatarRalf Wildenhues <Ralf.Wildenhues@gmx.de>
    Signed-off-by: default avatarJonathan Nieder <jrnieder@gmail.com>
    Signed-off-by: default avatarJunio C Hamano <gitster@pobox.com>
    1e58dba1
aclocal.m4 1.44 KB