pkg/54134: Building textproc/openjade with ccache results with it crashing on doc/guide

>Number:         54134
>Category:       pkg
>Synopsis:       Building textproc/openjade with ccache results with it crashing on doc/guide
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 21 11:40:00 +0000 2019
>Originator:     Chavdar Ivanov
>Release:        8.99.37
>Organization:
CI4 Consulting Ltd
>Environment:
NetBSD ymir 8.99.37 NetBSD 8.99.37 (GENERIC) #4: Thu Apr 18 22:51:42 BST 2019  sysbuild@ymir:/home/sysbuild/amd64/obj/home/sysbuild/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
Building textproc/openjade with /etc/mk.conf containing

CCACHE_DIR?=            /usr/pkg/.ccache
PKGSRC_COMPILER=        ccache gcc

results in an executable which crashes on processing doc/guide, as described in pkg/54105. If openjade is built without the above, it completes the guide production. 


>How-To-Repeat:
echo 'PKGSRC_COMPILER=        ccache gcc' >> /etc/mk.conf
cd /usr/pkgsrc/textproc/openjade
make clean package #? replace or install
cd /usr/pkgsrc/doc/guide && make 

 
 
 
>Fix:
Rebuilding textproc/openjade without ccache solves this particular problem, but the fact that it exists brings ccache into disrepute.