https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79087
Bug ID: 79087
Summary: CPATH environment variable not recognised.
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: w6ws at earthlink dot net
Target Milestone: ---
The ENVIRONMENT portion of the gfortran man page states:
The gfortran compiler currently does not make use of any environment
variables to control its operation above and beyond those that affect
the operation of gcc.
Then referring to the ENVIRONMENT portion of the gcc man page, under CPATH, it
states:
CPATH specifies a list of directories to be searched as if
specified with -I, but after any paths given with -I options on the
command line. This environment variable is used regardless of
which language is being preprocessed.
Unfortunately gfortran does not seem to recognize CPATH:
wws@w6ws-4:~$ cd /tmp
wws@w6ws-4:/tmp$ mkdir include
wws@w6ws-4:/tmp$ cat > include/inc.inc
integer, parameter :: answer = 42
wws@w6ws-4:/tmp$ export CPATH=/tmp/include
wws@w6ws-4:/tmp$ cat > junk.f90
program junk
include "inc.inc"
print *, answer
end program
wws@w6ws-4:/tmp$ gfortran junk.f90
junk.f90:2: Error: Can't open included file 'inc.inc'
wws@w6ws-4:/tmp$ gfortran -I$CPATH junk.f90
wws@w6ws-4:/tmp$ a.out
42
wws@w6ws-4:/tmp$ /tmp$ gfortran --version
GNU Fortran (GCC) 7.0.0 20160831 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
wws@w6ws-4:/tmp$
Intel Fortran does support this. It is handy when used in conjunction with the
"module" package that is often used at sites to select various software
packages.
This ticket might be a duplicate of PR 65998, but that ticket seems more
pre-processor (cpp) and architecture oriented.
