libelf: Keep the libelf part of elfutils

While all of elfutils does not build with clang, the libelf part does
and is needed by ltrace. So keep libelf as a package and let it replace
elfutils for now.

disabled-packages/elfutils/build.sh → packages/libelf/build.sh

@@ -1,6 +1,7 @@
-# Status: Does not build with clang
 TERMUX_PKG_HOMEPAGE=https://sourceware.org/elfutils/
 TERMUX_PKG_DESCRIPTION="ELF object file access library"
+# NOTE: We only build the libelf part of elfutils for now,
+# as other parts are not clang compatible.
 TERMUX_PKG_VERSION=(0.173
 		    1.3)
 TERMUX_PKG_SHA256=(b76d8c133f68dad46250f5c223482c8299d454a69430d9aa5c19123345a000ff
@@ -8,13 +9,18 @@ TERMUX_PKG_SHA256=(b76d8c133f68dad46250f5c223482c8299d454a69430d9aa5c19123345a00
 TERMUX_PKG_SRCURL=(ftp://sourceware.org/pub/elfutils/${TERMUX_PKG_VERSION}/elfutils-${TERMUX_PKG_VERSION}.tar.bz2
 		   http://www.lysator.liu.se/~nisse/archive/argp-standalone-${TERMUX_PKG_VERSION[1]}.tar.gz)
 # libandroid-support for langinfo.
-TERMUX_PKG_DEPENDS="libandroid-support, liblzma, libbz2"
+TERMUX_PKG_DEPENDS="libandroid-support"
 # Use "eu-" as program prefix to avoid conflict with binutils programs.
 # This is what several linux distributions do.
-TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--program-prefix='eu-'
---disable-symbol-versioning"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
+ac_cv_c99=yes
+--program-prefix='eu-'
+--disable-symbol-versioning
+"
 # The ar.c file is patched away for now:
 TERMUX_PKG_RM_AFTER_INSTALL="bin/eu-ar"
+TERMUX_PKG_CONFLICTS=elfutils
+TERMUX_PKG_REPLACES=elfutils
 
 termux_step_pre_configure() {
 	CFLAGS+=" -Wno-error=unused-value -Wno-error=format-nonliteral -Wno-error"
@@ -39,3 +45,12 @@ termux_step_pre_configure() {
 	LDFLAGS+=" -L$TERMUX_PKG_SRCDIR/argp-standalone-${TERMUX_PKG_VERSION[1]}"
 	CPPFLAGS+=" -isystem $TERMUX_PKG_SRCDIR/argp-standalone-${TERMUX_PKG_VERSION[1]}"
 }
+
+termux_step_make() {
+	make -j $TERMUX_MAKE_PROCESSES -C lib
+	make -j $TERMUX_MAKE_PROCESSES -C libelf
+}
+
+termux_step_make_install() {
+	make -j $TERMUX_MAKE_PROCESSES -C libelf install
+}