Avoid a race condition in glibc between AIO and setresuid().

[samba.git] / source / configure.in

diff --git a/source/configure.in b/source/configure.in
index 9c31de4bf3b3486226fe99758c4b5497b9480a6d..dcdad47c3fd807961c1e2be1f81abec054c39f5d 100644 (file)
--- a/source/configure.in
+++ b/source/configure.in
@@ -1767,8 +1767,10 @@ SHLIBEXT="so"
                        ;;
                *aix*) AC_DEFINE(AIX,1,[Whether the host os is aix])
                        BLDSHARED="true"
-                       LDSHFLAGS="-Wl,-G,-bexpall,-bbigtoc"
-                       DYNEXP="-Wl,-brtl,-bexpall,-bbigtoc"
+                       # use expfull to export underscored symbols
+                       # add rtl to LDSHFLAGS to fix /lib/crt0.o warning
+                       LDSHFLAGS="-Wl,-G,-bexpfull,-bbigtoc,-brtl"
+                       DYNEXP="-Wl,-brtl,-bexpfull,-bbigtoc"
                        PICFLAG="-O2"
                        # as AIX code is always position independent...
                        # .po will just create compile warnings, use po.o:
@@ -2867,30 +2869,32 @@ fi
 ################################################
 # look for a method of setting the effective uid
 seteuid=no;
+
 if test $seteuid = no; then
-AC_CACHE_CHECK([for setresuid],samba_cv_USE_SETRESUID,[
+AC_CACHE_CHECK([for setreuid],samba_cv_USE_SETREUID,[
 AC_TRY_RUN([
 #define AUTOCONF_TEST 1
-#define USE_SETRESUID 1
+#define USE_SETREUID 1
 #include "confdefs.h"
 #include "${srcdir-.}/lib/util_sec.c"],
-           samba_cv_USE_SETRESUID=yes,samba_cv_USE_SETRESUID=no,samba_cv_USE_SETRESUID=cross)])
-if test x"$samba_cv_USE_SETRESUID" = x"yes"; then
-    seteuid=yes;AC_DEFINE(USE_SETRESUID,1,[Whether setresuid() is available])
+           samba_cv_USE_SETREUID=yes,samba_cv_USE_SETREUID=no,samba_cv_USE_SETREUID=cross)])
+if test x"$samba_cv_USE_SETREUID" = x"yes"; then
+    seteuid=yes;AC_DEFINE(USE_SETREUID,1,[Whether setreuid() is available])
 fi
 fi
 
-
+# we check for setresuid second as it conflicts with AIO on Linux. 
+# see http://samba.org/~tridge/junkcode/aio_uid.c
 if test $seteuid = no; then
-AC_CACHE_CHECK([for setreuid],samba_cv_USE_SETREUID,[
+AC_CACHE_CHECK([for setresuid],samba_cv_USE_SETRESUID,[
 AC_TRY_RUN([
 #define AUTOCONF_TEST 1
-#define USE_SETREUID 1
+#define USE_SETRESUID 1
 #include "confdefs.h"
 #include "${srcdir-.}/lib/util_sec.c"],
-           samba_cv_USE_SETREUID=yes,samba_cv_USE_SETREUID=no,samba_cv_USE_SETREUID=cross)])
-if test x"$samba_cv_USE_SETREUID" = x"yes"; then
-    seteuid=yes;AC_DEFINE(USE_SETREUID,1,[Whether setreuid() is available])
+           samba_cv_USE_SETRESUID=yes,samba_cv_USE_SETRESUID=no,samba_cv_USE_SETRESUID=cross)])
+if test x"$samba_cv_USE_SETRESUID" = x"yes"; then
+    seteuid=yes;AC_DEFINE(USE_SETRESUID,1,[Whether setresuid() is available])
 fi
 fi
 
@@ -5808,6 +5812,7 @@ case "$host_os" in
                WINBIND_NSS_EXTRA_OBJS="nsswitch/winbind_nss_solaris.o \
                    nsswitch/winbind_nss_linux.o"
                WINBIND_NSS_EXTRA_LIBS="-lsocket"
+               PAM_WINBIND_EXTRA_LIBS="-lsocket"
                ;;
        *hpux11*)
                WINBIND_NSS_EXTRA_OBJS="nsswitch/winbind_nss_solaris.o"
@@ -5832,6 +5837,7 @@ AC_SUBST(WINBIND_NSS_LDSHFLAGS)
 AC_SUBST(WINBIND_NSS_EXTRA_OBJS)
 AC_SUBST(WINBIND_NSS_EXTRA_LIBS)
 AC_SUBST(NSSSONAMEVERSIONSUFFIX)
+AC_SUBST(PAM_WINBIND_EXTRA_LIBS)
 
 AC_SUBST(SMB_KRB5_LOCATOR)