glibc: Disable Werror when building with debug options

Since compiler does not optimize away a lot of stuff we end up with
Werrors e.g.

./sysdeps/ieee754/flt-32/s_log1pf.c: In function '__log1pf':
../sysdeps/ieee754/flt-32/s_log1pf.c:114:22: error: 'c' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  114 |        + (k * ln2_lo + c))) - f);
      |          ~~~~~~~~~~~~^~~~

which otherwise wont happen, so lets build with warnings-as-errors
disabled in debug mode

given we disable werror, now we don't have to restrict user to compile
without -O0

(From OE-Core rev: 9772eaafc1cb5957661d43e8f76c6f9b07b854dc)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/glibc.inc

@@ -2,15 +2,6 @@ require glibc-common.inc
 require glibc-ld.inc
 require glibc-testing.inc
 
-python () {
-    opt_effective = "-O"
-    for opt in d.getVar('SELECTED_OPTIMIZATION').split():
-        if opt in ("-O0", "-O", "-O1", "-O2", "-O3", "-Os"):
-            opt_effective = opt
-    if opt_effective == "-O0":
-        bb.fatal("%s can't be built with %s, try -O1 instead" % (d.getVar('PN'), opt_effective))
-}
-
 DEPENDS = "virtual/${TARGET_PREFIX}gcc libgcc-initial linux-libc-headers"
 
 PROVIDES = "virtual/libc"

meta/recipes-core/glibc/glibc_2.29.bb

@@ -85,6 +85,7 @@ EXTRA_OECONF = "--enable-kernel=${OLDEST_KERNEL} \
                 --disable-crypt \
                 --with-default-link \
                 --enable-nscd \
+                ${@bb.utils.contains_any('SELECTED_OPTIMIZATION', '-O0 -Og', '--disable-werror', '', d)} \
                 ${GLIBCPIE} \
                 ${GLIBC_EXTRA_OECONF}"