MySQL Bugs: #24792: compile-pentium-gcov fails while trying to compile bdb

Bug #24792	compile-pentium-gcov fails while trying to compile bdb
Submitted:	4 Dec 2006 10:51	Modified:	31 Jan 2008 17:02
Reporter:	Sergey Vojtovich	Email Updates:
Status:	Won't fix	Impact on me:	None
Category:	MySQL Server: Compiling	Severity:	S3 (Non-critical)
Version:	4.1	OS:	Linux (Debian (Sarge))
Assigned to:	Daniel Fischer	CPU Architecture:	Any

Description:
BUILD/compile-pentium-gcov fails while trying to compile bdb. Seem to affect 4.1 only.

/bin/sh ./libtool --mode=link gcc -o db_archive -rdynamic \
    db_archive.o util_sig.o libdb.a -lpthread
gcc -o db_archive -rdynamic db_archive.o util_sig.o  libdb.a -lpthread
db_archive.o(.text+0x89d): In function `global constructors keyed to main_GCOV':
../.././bdb/dist/../db_archive/db_archive.c:180: undefined reference to `__gcov_init'
db_archive.o(.data+0x64): In function `main':
../.././bdb/dist/../db_archive/db_archive.c:48: undefined reference to `__gcov_merge_add'
util_sig.o(.text+0x16f): In function `global constructors keyed to __db_util_siginit_GCOV':
../.././bdb/dist/../common/util_sig.c:86: undefined reference to `__gcov_init'

How to repeat:
BUILD/compile-pentium-gcov

Thank you for the report.

Verified as described on Linux using last BK sources.

I think this might be solved by backporting relevant fixes to BUILD/compile-pentium-gcov from 5.0:

+# GCC4 needs -fprofile-arcs -ftest-coverage on the linker command line (as well
+# as on the compiler command line), and this requires setting LDFLAGS for BDB.
+export LDFLAGS="-fprofile-arcs -ftest-coverage"

Might also be good to include some other fixes:

+# Need to disable ccache, or we loose the gcov-needed compiler output files.
+CCACHE_DISABLE=1
+export CCACHE_DISABLE

-extra_flags="$pentium_cflags  -fprofile-arcs -ftest-coverage"
+# The  -fprofile-arcs and -ftest-coverage options cause GCC to instrument the
+# code with profiling information used by gcov.
+# the -DDISABLE_TAO_ASM is needed to avoid build failures in Yassl.
+extra_flags="$pentium_cflags -fprofile-arcs -ftest-coverage -DDISABLE_TAO_ASM"