The -I option inhibits the use of the current file directory as the first
search directory for #include "file". This is important for software
development which uses partially populated source trees for which the build
"looks through" other trees to find the missing pieces.
Without -I- gcc should offer something like the IBM xlc -qidirfirst option:
Specifies the search order for files included with
the '#include' <file_name> directive. Use
-qidirfirst with the -I option. If -qidirfirst is
specified, the directories specified by the
-I<directory> option are searched before the
directory where the current file resides. The
default is -qnoidirfirst.
This is all we need, but over the last 10 years we have instead pushed vendors
to support the -I- option. It is sadly ironic that gcc deprecates it.
My employer does not use `nmake', but `nmake' has noticed this too:
http://www.bell-labs.com/project/nmake/newsletters/issue021.html
--
Summary: Without -I- gcc needs another way to defer source dir.
search
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: trt at acm dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27137
