https://bugs.gentoo.org/744286

--- libbytesize-2.4/configure.ac
+++ libbytesize-2.4/configure.ac
@@ -6,7 +6,7 @@
 # This needs to be set before initializing automake
 AC_DISABLE_STATIC
 
-AM_INIT_AUTOMAKE([foreign -Wall -Werror -Wno-syntax -Wno-portability])
+AM_INIT_AUTOMAKE([foreign -Wall -Wno-syntax -Wno-portability])
 AC_CONFIG_MACRO_DIR([m4])
 
 # Check for the gettext programs
--- libbytesize-2.4/src/Makefile.am
+++ libbytesize-2.4/src/Makefile.am
@@ -2,7 +2,7 @@
 LDADD = $(LIBINTL)
 
 lib_LTLIBRARIES = libbytesize.la
-libbytesize_la_CFLAGS = -Wall -Wextra -Werror -Wno-overflow -D_GNU_SOURCE
+libbytesize_la_CFLAGS = -Wall -Wextra -Wno-overflow -D_GNU_SOURCE
 libbytesize_la_LIBADD = -lgmp -lmpfr $(PCRE2_LIBS)
 libbytesize_la_LDFLAGS = -version-info 1:0:0
 libbytesize_la_SOURCES = bs_size.c bs_size.h gettext.h