gh-98948: Remove obsolete readelf dependency (#98949)

This got introduced in commit 5884449 to determine if readline is already linked against curses or tinfo in the setup.py, which is no longer present.

Author: serge-sans-paille

Makefile.pre.in

@@ -38,7 +38,6 @@ CC=	@CC@
 CXX=	@CXX@
 LINKCC=	@LINKCC@
 AR=	@AR@
-READELF=	@READELF@
 SOABI=	@SOABI@
 LDVERSION=	@LDVERSION@
 LIBPYTHON=	@LIBPYTHON@

Misc/NEWS.d/next/Build/2022-11-02-10-56-40.gh-issue-98949.3SRD8C.rst

@@ -0,0 +1 @@
+Drop unused build dependency on ``readelf``.

Tools/wasm/config.site-wasm32-emscripten

@@ -14,9 +14,6 @@ ac_cv_buggy_getaddrinfo=no
 ac_cv_file__dev_ptmx=no
 ac_cv_file__dev_ptc=no
 
-# dummy readelf, Emscripten build does not need readelf.
-ac_cv_prog_ac_ct_READELF=true
-
 # new undefined symbols / unsupported features
 ac_cv_func_posix_spawn=no
 ac_cv_func_posix_spawnp=no

Tools/wasm/config.site-wasm32-wasi

@@ -9,9 +9,6 @@ ac_cv_buggy_getaddrinfo=no
 ac_cv_file__dev_ptmx=no
 ac_cv_file__dev_ptc=no
 
-# dummy readelf, WASI build does not need readelf.
-ac_cv_prog_ac_ct_READELF=true
-
 # get/setrlimit are not supported
 ac_cv_header_sys_resource_h=no
 

configure

@@ -1617,17 +1617,6 @@ then
  ARFLAGS="rcs"
 fi
 
-AC_CHECK_TOOLS([READELF], [readelf], [:])
-if test "$cross_compiling" = yes; then
- case "$READELF" in
-readelf|:)
-AC_MSG_ERROR([readelf for the host is required for cross builds])
-;;
- esac
-fi
-AC_SUBST(READELF)
-
-
 case $MACHDEP in
 hp*|HP*)
 # install -d does not work on HP-UX