vim: add knob whether elf.h are checked

Previously, it still was checked when there was no elf library in sysroots directory.
Add knob to decide whether elf.h are checked or not.

Upstream-status: Pending

Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
---
 src/configure.in |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/configure.in b/src/configure.in
index d734064..f504fa6 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -2483,11 +2483,18 @@ AC_TRY_COMPILE([#include <stdio.h>], [int x __attribute__((unused));],
 	AC_MSG_RESULT(no))
 
 dnl Checks for header files.
+AC_MSG_CHECKING(whether or not to look for elf.h)
+AC_ARG_ENABLE(elf-check,
+        [  --enable-elf-check      If elfutils, check for elf.h [default=no]],
+        , enable_elf_check="no")
+AC_MSG_RESULT($enable_elf_check)
+if test "x$enable_elf_check" != "xno"; then
 AC_CHECK_HEADER(elf.h, HAS_ELF=1)
 dnl AC_CHECK_HEADER(dwarf.h, SVR4=1)
 if test "$HAS_ELF" = 1; then
   AC_CHECK_LIB(elf, main)
 fi
+fi
 
 AC_HEADER_DIRENT
 
-- 
1.7.9.5