0000969: CXX environment variable being ignored with configure

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Date Submitted

Last Update

0000969

OMNeT++

Installer / Productizing

public

2016-11-25 14:54

2017-02-01 13:57

Reporter

asantos

Assigned To

rhornig

Priority

normal

Severity

minor

Reproducibility

always

Status

resolved

Resolution

no change required

Platform

x86_64

GNU/Linux

OS Version

Product Version

5.0

Target Version

Fixed in Version

5.1pre3

Summary

0000969: CXX environment variable being ignored with configure

Description

We have our own environment of compiler where GCC is installed in network filesystem. The configure script on Linux x86_64 is broken for the CXX variable:

$ CXX=$(which g++) CC=$(which gcc) ./configure
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
configure: -----------------------------------------------
configure: reading configure.user for your custom settings
configure: -----------------------------------------------
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /afs/qqq/bin/gcc accepts -g... yes
checking for /afs/qqq/bin/gcc option to accept ISO C89... none needed
checking whether we are using the GNU C++ compiler... yes
checking whether /afs/qqq/bin/g++ accepts -g... yes
checking for /afs/qqq/bin/g++... not found
configure: error: No C++ compiler found -- one is required to build OMNeT++/OMNEST, and also for model development.

Replacing CXX with tmp_CXX works fine.

$ tmp_CXX=$(which g++) CC=$(which gcc) ./configure

Steps To Reproduce

1. Download Omnet++ 5.0, unzip into desired location
2. Call configure script with custom CXX enviromnemt variable
3. The configure script complains about missing compiler.

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Notes
(0001280) rhornig (administrator) 2017-02-01 13:57	This is true, however ./configure is not meant to accept all variables from environment variables or command line options. You should instead set your preferred compiler inside configure.user by setting the CC and CXX variables there.

Issue History
Date Modified	Username	Field	Change
2016-11-25 14:54	asantos	New Issue
2017-02-01 13:57	rhornig	Note Added: 0001280
2017-02-01 13:57	rhornig	Status	new => resolved
2017-02-01 13:57	rhornig	Fixed in Version	=> 5.1pre3
2017-02-01 13:57	rhornig	Resolution	open => no change required
2017-02-01 13:57	rhornig	Assigned To	=> rhornig