Buildchain fixes and updates from Sebastian

* merges: (21 commits)
  Summary: fix to fix, do not blank EMACSPACKAGEPATH when finding ... Keywords: bldchn
  Summary: minor, also massage sxemacs calls in tests/ with batch env Keywords: bldchn
  Summary: minor, put XCCLDFLAGS in libtool built binaries and libs Keywords: build icc
  Summary: minor, provide XCCLDFLAGS to be passed on through libtool to the CC Keywords: build icc
  Summary: minor, tweak SXE_CHECK_LINKER_FLAGS Keywords: bldchn
  Summary: fix to fix, do not treat compiler flags as linker flags Keywords: bldchn
  Summary: minor, specifically check for all optimisation flags Keywords: bldchn
  Summary: fix, check for special diagnostic 10237 if CC=icc Keywords: bldchn
  Summary: fix, use all CFLAGS for linker flag check Keywords: bldchn
  Summary: minor, provide SXE_CHECK_COMPILER_XFLAG Keywords: bldchn
  Summary: cosmetics, add meself to sppm.texi Keywords: boasting
  Summary: minor, always pass on SXE_DYLD_PATH with pointers to the lwlibdir Keywords: bldchn
  Summary: minor, call the linker (or the compiler front-end) when ... Keywords: bldchn
  Summary: fix, carefully quote esd lib prepending Keywords: bldchn
  Summary: minor, rewrite linker checks to use the compiler front-end and XFLAG Keywords: bldchn
  Summary: cosmetics, add ar-lib wrapper script to git ignore file Keywords: bldchn
  Summary: fix to cosmetics, add AM_PROG_AR conditionally Keywords: bldchn
  Summary: cosmetics, add AM_PROG_AR like autoreconf suggests Keywords: bldchn
  Summary: minor, check certain compiler flags regardless of CC flavour Keywords: bldchn
  Summary: minor, provide C11 check for anonymous structs Keywords: bldchn
  ...

Conflicts:
	src/Makefile.am  -- trivial conflict resolved

Signed-off-by: Steve Youngs <steve@sxemacs.org>

diff --cc configure.ac
Simple merge

diff --cc src/Makefile.am
Simple merge