build: Fixes for packaging, and linux build

.github/workflows/build.yaml

@@ -55,7 +55,7 @@ jobs:
           apt update
           apt install -y \
             gcc-multilib g++-multilib \
-            lib32z1 libc6-dev:i386
+            lib32z1 libc6-dev:i386 gettext:i386
 
           apt install -y \
             build-essential autoconf libtool make

Makefile.am

@@ -8,4 +8,4 @@ install installdirs: SUBDIRS = src
 doc_DATA = COPYING
 docdir = $(prefix)/usr/$(PACKAGE)
 
-EXTRA_DIST = GPL3 res
+EXTRA_DIST = LICENSE res

configure.ac

@@ -85,7 +85,7 @@ AM_CONDITIONAL([HAS_WINDRES], [test -n "${WINDRES}" -a "$have_windows" = "yes"])
 # LIBS variable is updated to include that library while linking.
 
 AC_CHECK_LIB([intl], [libintl_version], [], [
-  AC_MSG_FAILURE([library libintl not found])
+  AC_MSG_WARN([library libintl not found, either built into glibc or missing])
 ])
 
 # Required by libbfd

src/Makefile.am

@@ -49,7 +49,7 @@ install-exec-hook:
 		xargs -I {} find $(shell dirname $(shell which ${CXX})) -name '{}'))
 	## Remove duplicates
 	$(eval lib_SHARED_INSTALL := $(sort $(lib_SHARED_INSTALL)))
-	cp $(lib_SHARED_INSTALL) $(DESTDIR)${prefix}/opt/$(PACKAGE)
+	cp $(lib_SHARED_INSTALL) $(DESTDIR)${prefix}/usr/$(PACKAGE)
 endif