Chaining instead of overriding Compiler Arguments with Config files

Question

__main__ OP

Created Jan ’18

Replies 2

Boosts 0

Participants 2

I have created some config files for my project. Each config files specify the header/library dependencies.

like

sdk1.xcconfig

===================================

HEADER_SEARCH_PATHS = $(inherited) $(SDKROOT)/SDK1/include

LIBRARY_SEARCH_PATHS=$(inherited) $(SDKROOT)/SDK1/Lib/$(CONFIGURATION)

===================================

sdk2.xcconfig

===================================

HEADER_SEARCH_PATHS = $(inherited) $(SDKROOT)/SDK2/include

LIBRARY_SEARCH_PATHS=$(inherited) $(SDKROOT)/SDK2/Lib/$(CONFIGURATION)

===================================

Target.xcconfig

===================================

#include "sdk1.xcconfig"

#include "sdk2.xcconfig"

HEADER_SEARCH_PATHS = $(inherited) /myownpaths/

===================================

when this is getting resolved it looks like the variables in target.xcconfig is overriding everything else in stead of chaining.

I tried

HEADER_SEARCH_PATHS = $(HEADER_SEARCH_PATHS) /mypaths/

it didnt work either.

Can someone please point what I am missing here. Thanks in advance

Boost

Answer 1

jonprescott OP

Jan ’18

Because that is what is happening! You are re-defining HEADER_SEARCH_PATHS in each config file. You need to do something like:

in sdk1.xcconfig:

SDK1_SEARCH_PATHS = ....

in sdk2.xcconfig:

SDK2_SEARCH_PATHS = ...

in Target.xcconfig:

HEADER_SEARCH_PATHS = $(inherited) $(SDK1_SEARCH_PATHS) $(SDK2_SEARCH_PATHS) /mypaths/

0

Answer 2

__main__ OP

Jan ’18

That makes sense but defining a new variable for each path and ensuring the target to include all the include path could be buggy. It would be nice if the config file supports a different assignment operator (~=for instance)

like

HEADER_SEARCH_PATHS ~= $(inherited) /myownpaths/ (for append in the end) or HEADER_SEARCH_PATHS =~ $(inherited) /myownpaths/ (for preappend)

so the values are appended instead of overwriting.

For now will try defining the variables and using that in the target.

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