[PATCH] luit: Convert platform #ifdefs to configure tests for functions & headers

[Alan Coopersmith]

Also check for __SVR4 in remaining SVR4 check to match Solaris compiler
default definition.

Signed-off-by: Alan Coopersmith <alan.coopersmith at sun.com>
---
 configure.ac |    3 +++
 luit.c       |    8 ++++++--
 sys.c        |   35 +++++++++++------------------------
 3 files changed, 20 insertions(+), 26 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0b3bc27..a05c0f0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,6 +38,9 @@ AC_CANONICAL_HOST
 
 XORG_CWARNFLAGS
 
+AC_CHECK_HEADERS([poll.h pty.h stropts.h sys/param.h sys/select.h])
+AC_CHECK_FUNCS([poll select grantpt])
+
 AC_CHECK_LIB(z, gzopen,, AC_MSG_ERROR([zlib not found]))
 
 AC_ARG_WITH(localealiasfile,
diff --git a/luit.c b/luit.c
index dd07653..7fa7acf 100644
--- a/luit.c
+++ b/luit.c
@@ -34,8 +34,12 @@ THE SOFTWARE.
 #include <sys/ioctl.h>
 #include <signal.h>
 
-#ifdef SVR4
-#include <stropts.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_STROPTS_H
+# include <stropts.h>
 #endif
 
 #include <X11/fonts/fontenc.h>
diff --git a/sys.c b/sys.c
index da97028..ba60fbf 100644
--- a/sys.c
+++ b/sys.c
@@ -34,14 +34,8 @@ THE SOFTWARE.
 #include <signal.h>
 #include <errno.h>
 
-#ifdef SVR4
-#define HAVE_POLL
-#endif
-
-#ifndef HAVE_POLL
-#ifndef _MINIX
-#define HAVE_SELECT
-#endif
+#ifdef HAVE_CONFIG_H
+# include "config.h"
 #endif
 
 #ifdef HAVE_POLL
@@ -49,27 +43,20 @@ THE SOFTWARE.
 #undef HAVE_SELECT
 #endif
 
-#ifdef __QNX__
-#include <sys/select.h>
-#endif
-
-
-#if (defined(__GLIBC__) && \
-     (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1))) || \
-    defined(SVR4) || defined(__APPLE__)
-#define HAVE_GRANTPT
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
 #endif
 
-#ifdef __GLIBC__
-#include <pty.h>
+#ifdef HAVE_PTY_H
+# include <pty.h>
 #endif
 
-#ifdef SVR4
-#include <stropts.h>
+#ifdef HAVE_STROPTS_H
+# include <stropts.h>
 #endif
 
-#if (defined(__unix__) || defined(unix)) && !defined(USG)
-#include <sys/param.h>
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
 #endif
 
 #include "sys.h"
@@ -433,7 +420,7 @@ openTty(char *line)
     }
 #endif
 
-#ifdef SVR4
+#if defined(SVR4) || defined(__SVR4)
     rc = ioctl(tty, I_PUSH, "ptem");
     if(rc < 0)
         goto bail;
-- 
1.5.6.5