[PATCH] cygwin070patches_4.patch

[Reini Urban]

My latest patch against the cygwin070patches branch r30596.

* Finished implementation of the makefile expansion - "perl-style"
* Changed all relevant makefile templates.



A new idea:
===========
#IF(darwin):
#ALSO:# MACOSX_DEPLOYMENT_TARGET must be defined for OS X
#ALSO:export MACOSX_DEPLOYMENT_TARGET := @osx_version@


The POD for this change:
========================
=item conditioned_lines #IF #UNLESS #ELSIF #ELSE

If conditioned_lines is true, then several expressions at the first column
are evaluated and replaced by the content after the C<:> dependending on
the evaluation of the expression.

Lines beginning with C<#IF(expr):> are skipped if the expr
condition is false, otherwise the content after the C<:> is inserted.
Lines beginning with C<#UNLESS(expr):> are skipped if the expr condition
is true.

evaluated to false.
Lines beginning with C<#ELSE:> are evaluated if the former C<#IF(expr):> or
C<#ELSIF(expr):> evaluated to false.

For legacy the old syntax #CONDITIONED_LINE(var): and
#INVERSE_CONDITIONED_LINE(var): is also supported.
For lispers the well-known reader-macro syntax #+(and key1 (not key2)):
is also supported, #+ #- with and, or and not, or being the default
for multiple keys without operator. But note the ending C<:>.

A condition expr may be:

  * a single key, which is true if a config key is true
    - not 0 and not undef and not an empty string,
  * or equal to the platform name, the perl5 osname - case-sensitive,
  * or a key=value expression, which checks for the config key,
    Note that values may contain no spaces here. Quotes in values
    are not supported.
  * or a logical combination of C<|> (or), C<&> (and) and C<!> (not),
    with the following order of precedence:  ! & |

A key must only consist of word characters, and is checked
case-sensitively against the config key or the platform name.

For instance:

  #IF(win32): $(SRC_DIR)/atomic/gcc_x86$(O)

will be processed if the platform is win32.

  #IF(cpuarch=i386): $(SRC_DIR)/atomic/gcc_x86$(O)

will be skipped if the value of the config key "cpuarch" is not "i386".

  #IF(cpuarch=i386): $(SRC_DIR)/atomic/gcc_x86$(O)
  #ELSIF(cpuarch=sparcv9): $(SRC_DIR)/atomic/sparc_v9.s
  #ELSE:

will use " $(SRC_DIR)/atomic/gcc_x86$(O)" on cpuarch=i386,
" $(SRC_DIR)/atomic/sparc_v9.s" on cpuarch=sparcv9
and print an empty line otherwise.

  #IF(win32 & glut & !cygwin):

will be used on win32 and if glut is defined, but not on cygwin.

The hairy parts from the testsuite
==================================
dummy1=true, dummy2=false, dummy3=xx
       ["IF(dummy1&!dummy2&dummy3)",            1],
       ["UNLESS(!(dummy1&!dummy2&dummy3))",     1],
       ["IF(dummy1&(!dummy2&dummy3))",          1],
       ["IF(dummy1 & (dummy3=xx & (!dummy2)))", 1],

--
Reini Urban
http://phpwiki.org/  http://murbreak.at/

make fulltest and make codetest has the same few mt-thread and resume errors as always. Lines beginning with C<#ELSIF(expr):> are evaluated if the former C<#IF(expr):>

cygwin070patches_4.patch.gz
Description: GNU Zip compressed data