component/fish-shell: build with slapos pcre2

This was downloading pcre2 from git or using system package if available

component/fish-shell/buildout.cfg

@@ -3,13 +3,14 @@
 [buildout]
 parts = fish-shell
 extends =
-  ../cmake/buildout.cfg
-  ../zlib/buildout.cfg
   ../bzip2/buildout.cfg
+  ../cmake/buildout.cfg
+  ../gettext/buildout.cfg
   ../ncurses/buildout.cfg
+  ../pcre2/buildout.cfg
   ../readline/buildout.cfg
-  ../gettext/buildout.cfg
   ../xz-utils/buildout.cfg
+  ../zlib/buildout.cfg
 
 [fish-shell]
 recipe = slapos.recipe.cmmi
@@ -22,13 +23,15 @@ configure-options =
   -DCMAKE_C_FLAGS="${:CMAKE_CFLAGS}"
   -DCMAKE_CXX_FLAGS="${:CMAKE_CFLAGS}"
   -DCMAKE_INSTALL_RPATH=${:CMAKE_LIBRARY_PATH}
+  -DFISH_USE_SYSTEM_PCRE2=ON
+  -DSYS_PCRE2_INCLUDE_DIR=${pcre2:location}/include
 environment =
   CMAKE_PROGRAM_PATH=${cmake:location}/bin
   CMAKE_INCLUDE_PATH=${bzip2:location}/include:${zlib:location}/include:${ncurses:location}/include:${gettext:location}/include:${readline:location}/include
   CMAKE_LIBRARY_PATH=${:CMAKE_LIBRARY_PATH}
-  LDFLAGS=-L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
+  LDFLAGS=-L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${pcre2:location}/lib -Wl,-rpath=${pcre2:location}/lib
   PATH=${xz-utils:location}/bin/:%(PATH)s
 
-CMAKE_CFLAGS = -I${bzip2:location}/include -I${zlib:location}/include -I${ncurses:location}/include -I${gettext:location}/include -I${readline:location}/include
-CMAKE_LIBRARY_PATH = ${bzip2:location}/lib:${zlib:location}/lib:${ncurses:location}/lib:${gettext:location}/lib:${readline:location}/lib
+CMAKE_CFLAGS = -I${bzip2:location}/include -I${zlib:location}/include -I${ncurses:location}/include -I${gettext:location}/include -I${readline:location}/include -I${pcre2:location}/include
+CMAKE_LIBRARY_PATH = ${bzip2:location}/lib:${zlib:location}/lib:${ncurses:location}/lib:${gettext:location}/lib:${readline:location}/lib:${pcre2:location}/lib
 location = @@LOCATION@@