MySQL relied on the behavior fixed in PR15638 to implement a poor man's ABI
check.
By keeping a copy of the preprocessed output, it was somewhat possible to
detect (via a diff) whether a change to some header might affect the ABI. MySQL
headers are a bit convoluted, being used by client programs and the server
itself.
Although not entirely reliable, this behavior was quite useful for this
purpose. Would it possible to somehow instruct cpp to continue even if a header
is missing? Something along the lines of a -Wno-fatal-errors... or restore the
behavior if cpp is invoked directly.
--
Summary: Missing headers are always fatal
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: davi dot arnaut at sun dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44836
