elfutils: Add host build

Needed for glib2 host build:

gresource-tool.c:32:20: fatal error: libelf.h: No such file or directory
 #include <libelf.h>

Changed PKG_LICENSE to the SPDX version.

Switched build dependency for argp-standalone to !USE_GLIBC. argp is a
glibc extension. Treat it as such.

Adjusted patch to use strerror_l, which works properly with both glibc
and musl. The patch errors under glibc with:

dwfl_error.c:158:7: error: ignoring return value of 'strerror_r', declared
with attribute warn_unused_result [-Werror=unused-result]
       strerror_r (error & 0xffff, s, sizeof(s));

void casting does not fix the error.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/libs/elfutils/Makefile

@@ -8,23 +8,24 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=elfutils
 PKG_VERSION:=0.177
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://sourceware.org/$(PKG_NAME)/ftp/$(PKG_VERSION)
 PKG_HASH:=fa489deccbcae7d8c920f60d85906124c1989c591196d90e0fd668e3dc05042e
+
 PKG_MAINTAINER:=Luiz Angelo Daros de Luca <luizluca@gmail.com>
-PKG_LICENSE:=GPL-3.0+
+PKG_LICENSE:=GPL-3.0-or-later
 PKG_LICENSE_FILES:=COPYING COPYING-GPLV2 COPYING-LGPLV3
 PKG_CPE_ID:=cpe:/a:elfutils_project:elfutils
-PKG_FIXUP:=autoreconf
 
+PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1
 PKG_USE_MIPS16:=0
-
-PKG_BUILD_DEPENDS:=USE_UCLIBC:argp-standalone USE_MUSL:argp-standalone
+PKG_BUILD_DEPENDS:=!USE_GLIBC:argp-standalone
 
 include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/nls.mk
 
 define Package/elfutils/Default
@@ -96,3 +97,4 @@ endef
 $(eval $(call BuildPackage,libasm))
 $(eval $(call BuildPackage,libdw))
 $(eval $(call BuildPackage,libelf))
+$(eval $(call HostBuild))

package/libs/elfutils/patches/100-musl-compat.patch

@@ -44,21 +44,12 @@ https://sourceware.org/bugzilla/show_bug.cgi?id=21002
  }
 --- a/libdwfl/dwfl_error.c
 +++ b/libdwfl/dwfl_error.c
-@@ -140,6 +140,7 @@ __libdwfl_seterrno (Dwfl_Error error)
- const char *
- dwfl_errmsg (int error)
- {
-+  static __thread char s[64] = "";
-   if (error == 0 || error == -1)
-     {
-       int last_error = global_error;
-@@ -154,7 +155,8 @@ dwfl_errmsg (int error)
+@@ -154,7 +154,7 @@ dwfl_errmsg (int error)
    switch (error &~ 0xffff)
      {
      case OTHER_ERROR (ERRNO):
 -      return strerror_r (error & 0xffff, "bad", 0);
-+      strerror_r (error & 0xffff, s, sizeof(s));
-+      return s;
++      return strerror_l (error & 0xffff, LC_GLOBAL_LOCALE);
      case OTHER_ERROR (LIBELF):
        return elf_errmsg (error & 0xffff);
      case OTHER_ERROR (LIBDW):