libselinux: use PCRE2 by default

Quoting pcre.org:

    There are two major versions of the PCRE library. The current
    version, PCRE2, released in 2015, is now at version 10.39.

    The older, but still widely deployed PCRE library, originally
    released in 1997, is at version 8.45. This version of PCRE is now at
    end of life, and is no longer being actively maintained. Version
    8.45 is expected to be the final release of the older PCRE library,
    and new projects should use PCRE2 instead.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>

libselinux/Makefile

@@ -23,7 +23,7 @@ ifeq ($(DISABLE_X11),y)
 endif
 export DISABLE_SETRANS DISABLE_RPM DISABLE_FLAGS ANDROID_HOST DISABLE_X11 LABEL_BACKEND_ANDROID
 
-USE_PCRE2 ?= n
+USE_PCRE2 ?= y
 ifeq ($(USE_PCRE2),y)
 	PCRE_MODULE := libpcre2-8
 	PCRE_CFLAGS := -DUSE_PCRE2 -DPCRE2_CODE_UNIT_WIDTH=8

libselinux/src/Makefile

@@ -98,7 +98,6 @@ override LDFLAGS += -L/opt/local/lib -undefined dynamic_lookup
 LD_SONAME_FLAGS=-install_name,$(LIBSO)
 endif
 
-PCRE_LDLIBS ?= -lpcre
 # override with -lfts when building on Musl libc to use fts-standalone
 FTS_LDLIBS ?=
 

libselinux/utils/Makefile

@@ -44,7 +44,6 @@ endif
 override CFLAGS += -I../include -D_GNU_SOURCE $(DISABLE_FLAGS) $(PCRE_CFLAGS)
 override LDFLAGS += -L../src
 override LDLIBS += -lselinux $(FTS_LDLIBS)
-PCRE_LDLIBS ?= -lpcre
 
 ifeq ($(ANDROID_HOST),y)
 TARGETS=sefcontext_compile