[Boost-bugs] [Boost C++ Libraries] #6887: Hardcoded path to g++ in gcc.mak and gcc-shared.mak for regex

Subject: [Boost-bugs] [Boost C++ Libraries] #6887: Hardcoded path to g++ in gcc.mak and gcc-shared.mak for regex
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-05-10 13:21:18

#6887: Hardcoded path to g++ in gcc.mak and gcc-shared.mak for regex
-----------------------------------------------------------+----------------
 Reporter:  Morten Rasmussen <mortenrasmussen@…>           |       Owner:  johnmaddock
     Type:  Bugs                                           |      Status:  new        
Milestone:  To Be Determined                               |   Component:  regex      
  Version:  Boost 1.49.0                                   |    Severity:  Problem    
 Keywords:  gcc makefile g++ path                          |  
-----------------------------------------------------------+----------------
 The makefiles gcc.mak and gcc-shared.mak in boost/libs/regex/build both
 contain the lines

 CXX=g++
 LINKER=g++ -shared

 which means that the compiler will pick the g++ defined by the PATH
 variable.

 This is unfortunate if you have multiple gcc version on the machine and
 intend to link boost regex with modules compiled with another g++ version
 than the one defined by PATH.

 To fix this, I suggest that these lines are changed to

 CXX?=g++
 LINKER=$(CXX) -shared

 so that a CXX value passed to the makefile will prevail, and "g++" is
 still if no value is passed.

 In other words: this suggestion adds the option of passing an alternative
 CXX value to the makefile - the suggestion will be backward compatible by
 working as before if no value is passed.

 The changes in diff format:

 diff gcc.mak.orig gcc.mak
 24,25c24,25
 < CXX=g++
 < LINKER=g++ -shared
 ---
 > CXX?=g++
 > LINKER=$(CXX) -shared

 diff gcc-shared.mak.orig gcc-shared.mak
 24,25c24,25
 < CXX=g++
 < LINKER=g++ -shared
 ---
 > CXX?=g++
 > LINKER=$(CXX) -shared

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6887>
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