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Top Forums Shell Programming and Scripting GNU & BSD Makefile Directives & Conditions Compatibility Post 302921528 by AntumDeluge on Friday 17th of October 2014 08:54:29 PM
Old 10-17-2014
Question GNU & BSD Makefile Directives & Conditions Compatibility

Firstly, I would like to apologize if this is not the appropriate sub-forum to post about GNU/BSD makefile scripting. Though my code is in C++, because I am focusing on the makefile I thought it would go better in shell scripting. Please correct me if I am wrong.

Secondly, I am not interested in dealing with autotools/autogen yet. I want to focus on learning about make/gmake.


I have seen this subject posted on the web, but have not found a solution for myself yet.

I want users to be able to compile from my Makefile on Linux, BSD, & Windows systems. The makefile tests if the target platform is Win32 using conditional directives. I much prefer BSD as the GNU syntax is confusing to me:
Code:
...
EXESUFFIX=
ICON=myabcs.xpm
.if defined(WIN32) || defined(__WIN32__)
  EXESUFFIX=.exe
  ICON=myabcs.ico
.endif
...

However this is not compatible with GNU make:
Quote:
$ gmake
Makefile:20: *** missing separator. Stop.
For GNU make it needs to be something like this:
Code:
...
EXESUFFIX=
ICON=myabcs.xpm
ifdef WIN32 # don't know how to use logical "or" (||) here
  EXESUFFIX=.exe
  ICON=myabcs.ico
endif
ifdef __WIN32__
  EXESUFFIX=.exe
  ICON=myabcs.ico
endif
...

or I think I can use something like this (though this example doesn't work as intented):
Code:
...
EXESUFFIX=
ICON=myabcs.xpm
ifeq (,$(filter "",$(WIN32) $(__WIN32__)))
  EXESUFFIX=.exe
  ICON=myabcs.ico
endif
...

Neither of which are compatible with BSD make

My base question is how to make my Makefile both GNU & BSD compatible. Is it possible to do within a single file or do I need to separate them? Can I have a base makefile that imports another of either GNU or BSD standards? Or, do I just need to make 2 completely separate files?
 

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pods::SDL::Color(3pm)					User Contributed Perl Documentation				     pods::SDL::Color(3pm)

NAME
SDL::Color - Format independent color description CATEGORY Core, Video, Structure SYNOPSIS
my $black = SDL::Color->new(0, 0, 0); my $color = SDL::Color->new(255, 0, 0); my $r = $color->r; # 255 my $g = $color->g; # 0 my $b = $color->b; # 0 $color->g(255); $color->b(255); # $color is now white DESCRIPTION
"SDL_Color" describes a color in a format independent way. METHODS
new my $color = SDL::Color->new(255, 0, 0); The constructor creates a new color with the specified red, green and blue values. r my $r = $color->r; $color->r(128); If passed a value, this method sets the red component of the color; if not, it returns the red component of the color. g my $g = $color->g; $color->g(128); If passed a value, this method sets the green component of the color; if not, it returns the green component of the color. b my $b = $color->b; $color->b(128); If passed a value, this method sets the blue component of the color; if not, it returns the blue component of the color. SEE ALSO
SDL::Surface AUTHORS
See "AUTHORS" in SDL. perl v5.14.2 2012-05-28 pods::SDL::Color(3pm)
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