Use vfork() instead of fork() in [exec]

This allows systems with vfork() but not fork() to
have a full exec implementation, including constructs such
as 2>@1 and background exec with &

Also remove the --disable-fork option.
It doesn't really make sense now since exec uses vfork

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 2 insertions, 15 deletions

diff --git a/configure b/configure
index a81c71a..f4d1f08 100755
--- a/configure
+++ b/configure
@@ -682,7 +682,6 @@ SHELL'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
-enable_fork
 enable_math
 enable_ipv6
 enable_utf8
@@ -1320,7 +1319,6 @@ Optional Features:
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
-  --disable-fork          do not use fork (no exec, etc.)
   --enable-math           include support for math functions
   --enable-ipv6           include ipv6 support in the aio extension
   --enable-utf8           include support for utf8-encoded strings
@@ -3793,17 +3791,6 @@ case $host in
     ;;
 esac
 
-# Check whether --enable-fork was given.
-if test "${enable_fork+set}" = set; then :
-  enableval=$enable_fork;
-        if test "x$enableval" = "xno" ; then
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: * disabling fork" >&5
-$as_echo "* disabling fork" >&6; }
-            EXTRA_CFLAGS="-DJIM_NOFORK"
-        fi
-
-fi
-
 # Check whether --enable-math was given.
 if test "${enable_math+set}" = set; then :
   enableval=$enable_math;
@@ -3948,7 +3935,7 @@ if test "${with_jim_regexp+set}" = set; then :
 fi
 
 
-for ac_header in sys/un.h dlfcn.h termios.h
+for ac_header in sys/un.h dlfcn.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@@ -3970,7 +3957,7 @@ fi
 
 
 
-for ac_func in ualarm sysinfo lstat fork vfork
+for ac_func in ualarm sysinfo lstat vfork
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"