3 files changed, 23 insertions, 3 deletions

diff --git a/gl/m4/gnulib-cache.m4 b/gl/m4/gnulib-cache.m4
index e61a5362..d6fca2a3 100644
--- a/gl/m4/gnulib-cache.m4
+++ b/gl/m4/gnulib-cache.m4
@@ -27,7 +27,7 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files base64 crypto/sha1 dirname environ floorf fsusage getaddrinfo gethostname getloadavg getopt-gnu gettext mountlist regex setenv strcase strsep timegm unsetenv vasprintf vsnprintf
+#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files base64 crypto/sha1 dirname environ floorf fsusage getaddrinfo gethostname getloadavg getopt-gnu gettext idpriv-droptemp mountlist regex setenv strcase strsep timegm unsetenv vasprintf vsnprintf
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
@@ -43,6 +43,7 @@ gl_MODULES([
   getloadavg
   getopt-gnu
   gettext
+  idpriv-droptemp
   mountlist
   regex
   setenv
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index b3cb4c12..67a81566 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -28,7 +28,7 @@
 # other built files.
 
 
-# This macro should be invoked from ./configure.in, in the section
+# This macro should be invoked from ./configure.ac, in the section
 # "Checks for programs", right after AC_PROG_CC, and certainly before
 # any checks for libraries, header files, types and library functions.
 AC_DEFUN([gl_EARLY],
@@ -70,6 +70,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module gettext-h:
   # Code from module havelib:
   # Code from module hostent:
+  # Code from module idpriv-droptemp:
   # Code from module include_next:
   # Code from module inet_ntop:
   # Code from module intprops:
@@ -153,7 +154,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module xstrndup:
 ])
 
-# This macro should be invoked from ./configure.in, in the section
+# This macro should be invoked from ./configure.ac, in the section
 # "Check for header files, types and library functions".
 AC_DEFUN([gl_INIT],
 [
@@ -258,6 +259,7 @@ AC_DEFUN([gl_INIT],
   AC_SUBST([LIBINTL])
   AC_SUBST([LTLIBINTL])
   gl_HOSTENT
+  gl_IDPRIV
   gl_FUNC_INET_NTOP
   if test $HAVE_INET_NTOP = 0 || test $REPLACE_INET_NTOP = 1; then
     AC_LIBOBJ([inet_ntop])
@@ -658,6 +660,8 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/glthread/lock.c
   lib/glthread/lock.h
   lib/glthread/threadlib.c
+  lib/idpriv-droptemp.c
+  lib/idpriv.h
   lib/inet_ntop.c
   lib/intprops.h
   lib/itold.c
@@ -790,6 +794,7 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/gnulib-common.m4
   m4/hostent.m4
   m4/iconv.m4
+  m4/idpriv.m4
   m4/include_next.m4
   m4/inet_ntop.m4
   m4/intdiv0.m4
diff --git a/gl/m4/idpriv.m4 b/gl/m4/idpriv.m4
new file mode 100644
index 00000000..167f5238
--- /dev/null
+++ b/gl/m4/idpriv.m4
@@ -0,0 +1,14 @@
+# idpriv.m4 serial 1
+dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_IDPRIV],
+[
+  dnl Persuade glibc <unistd.h> to declare {get,set}res{uid,gid}.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([getuid geteuid getresuid getgid getegid getresgid])
+  AC_CHECK_FUNCS_ONCE([setresuid setreuid seteuid setresgid setregid setegid])
+])