https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70702
Bug ID: 70702
Summary: Build failure of ARM cross compiler under Cygwin -
libc_name_p
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: olivier at gautherot dot net
Target Milestone: ---
Created attachment 38296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38296&action=edit
Build script for reference
I tried to build an ARM cross compiler under Cygwin64 and got an error (symbol
not found) on libc_name_p. After some investigation, I tracked the root cause
down to the files gcc/cp/cfns.{h,gperf}. I suggest the following fix:
Replace
"const char * libc_name_p (const char *, unsigned int);"
with
"static const char * libc_name_p (const char *, unsigned int);"
By adding the "static" keyword, we ensure that the function is properly
inlined. There are 3 occurrences in cfns.h and cfns.gperf.
I attached my build scripts for reference.
Note: The same build scripts worked fine under Linux (Ubuntu, Centos) and
FreeBSD, with various versions of GCC and Clang/FreeBSD. The reason why GCC on
Cygwin misbehaved is still unclear.
