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0015973

CMake

public

2016-02-13 18:11

2016-06-10 14:31

Reporter

Paweł Stankowski

Assigned To

Kitware Robot

Priority

normal

Severity

trivial

Reproducibility

always

Status

closed

Resolution

moved

Platform

OS Version

Product Version

CMake 3.0.2

Target Version

Fixed in Version

Summary

0015973: ASM-ATT: cannot set assembler using environment variable

Description

Environment variable cannot be used for ATT dialect, because it contains dash in this variable's name ("ASM-ATT"). Bash and other shells won't parse assignment to variable containing such sign. There is an ugly workaround, though:
env 'ASM-ATT=~/bin/i386-linux-as' cmake ../src

CMakeDetermineASMCompiler.cmake checks for existance of environment variable ASM${ASM_DIALECT} at the early phase of lookup.

This works nicely for NASM and MASM assemblers, because they use underscore instead of dash (ASM_NASM, ASM_MASM).

Steps To Reproduce

1. Install two gas assemblers: in system and other directory.
2. In a build directory try to point cmake to the non-default assembler:
env 'ASM-ATT=<PATH-TO-OTHER-ASSEMBLER>' cmake ../src
3. Check which assembler was chosen:
grep ASM-ATT_COMPILER:FILEPATH CMakeCache.txt

Additional Information

I propose to solve that by replacing '-' by '_' when searching for environment variable in CMakeDetermineASMCompiler.cmake. It is possible to preserve backward compatibility by searching for both old and new variable. However, because it was so difficult to set ASM-ATT env variable, it is probably not needed.

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Notes
(0040487) Paweł Stankowski (reporter) 2016-02-13 18:20 edited on: 2016-02-13 18:22	BTW: Maybe some more/other environment variables should be supported. make checks AS and ASFLAGS environment variables: https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html [^] standard 'CC' and 'CFLAGS' env variables are already supported, why not add the assembler ones? autoconf sets and automake use 'CCAS' and 'CCASFLAGS' environment variables: https://www.gnu.org/software/automake/manual/html_node/Assembly-Support.html [^]

(0042940) Kitware Robot (administrator) 2016-06-10 14:29	Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current CMake Issues page linked in the banner at the top of this page.

Issue History
Date Modified	Username	Field	Change
2016-02-13 18:11	Paweł Stankowski	New Issue
2016-02-13 18:20	Paweł Stankowski	Note Added: 0040487
2016-02-13 18:21	Paweł Stankowski	Note Edited: 0040487
2016-02-13 18:21	Paweł Stankowski	Note Edited: 0040487
2016-02-13 18:22	Paweł Stankowski	Note Edited: 0040487
2016-06-10 14:29	Kitware Robot	Note Added: 0042940
2016-06-10 14:29	Kitware Robot	Status	new => resolved
2016-06-10 14:29	Kitware Robot	Resolution	open => moved
2016-06-10 14:29	Kitware Robot	Assigned To	=> Kitware Robot
2016-06-10 14:31	Kitware Robot	Status	resolved => closed