Avoid implicit function declarations and implicit ints for improved
compatibility with future compilers.

Submitted upstream: <https://github.com/xiaoyeli/superlu/pull/76>

diff --git a/EXAMPLE/cfgmr.c b/EXAMPLE/cfgmr.c
index 0f25f58923aa0c7e..d8f523f9b67fa5ca 100644
--- a/EXAMPLE/cfgmr.c
+++ b/EXAMPLE/cfgmr.c
@@ -33,6 +33,8 @@ For information on ITSOL contact saad@cs.umn.edu
 
 #define  epsmac  1.0e-16
 
+extern int ccopy_(int *, complex *, int *, complex *, int *);
+extern void caxpy_(int *, complex *, complex *, int *, complex *, int *);
 extern void cdotc_(complex *, int *, complex [], int *, complex [], int *);
 extern float scnrm2_(int *, complex [], int *);
 
diff --git a/EXAMPLE/clinsolx.c b/EXAMPLE/clinsolx.c
index bcf91124458cabbd..e4401b01b03e087f 100644
--- a/EXAMPLE/clinsolx.c
+++ b/EXAMPLE/clinsolx.c
@@ -18,6 +18,8 @@ at the top-level directory.
  */
 #include "slu_cdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
     char           equed[1];
diff --git a/EXAMPLE/clinsolx1.c b/EXAMPLE/clinsolx1.c
index 8c540d172194c9ad..8a4e8e5a2aa79ea9 100644
--- a/EXAMPLE/clinsolx1.c
+++ b/EXAMPLE/clinsolx1.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_cdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/clinsolx2.c b/EXAMPLE/clinsolx2.c
index 7fd680456c2baf3e..038bb4a77e41b3c8 100644
--- a/EXAMPLE/clinsolx2.c
+++ b/EXAMPLE/clinsolx2.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_cdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/clinsolx3.c b/EXAMPLE/clinsolx3.c
index 973eb2736b00fb4b..33a1ac2e164841b3 100644
--- a/EXAMPLE/clinsolx3.c
+++ b/EXAMPLE/clinsolx3.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_cdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/dfgmr.c b/EXAMPLE/dfgmr.c
index e19f11968199b7d3..97a3250c884d5495 100644
--- a/EXAMPLE/dfgmr.c
+++ b/EXAMPLE/dfgmr.c
@@ -33,6 +33,8 @@ For information on ITSOL contact saad@cs.umn.edu
 
 #define  epsmac  1.0e-16
 
+extern int dcopy_(int *, double *, int *, double *, int *);
+extern void daxpy_(int *, double *, double *, int *, double *, int *);
 extern double ddot_(int *, double [], int *, double [], int *);
 extern double dnrm2_(int *, double [], int *);
 
diff --git a/EXAMPLE/dlinsolx.c b/EXAMPLE/dlinsolx.c
index fdfd6727909f3308..271dd0b94815649c 100644
--- a/EXAMPLE/dlinsolx.c
+++ b/EXAMPLE/dlinsolx.c
@@ -18,6 +18,8 @@ at the top-level directory.
  */
 #include "slu_ddefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
     char           equed[1];
diff --git a/EXAMPLE/dlinsolx1.c b/EXAMPLE/dlinsolx1.c
index e6993f956f31c5fe..7038ece2ac29aa46 100644
--- a/EXAMPLE/dlinsolx1.c
+++ b/EXAMPLE/dlinsolx1.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_ddefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/dlinsolx2.c b/EXAMPLE/dlinsolx2.c
index 7050f438a8f29a96..5d93b81d9871fb11 100644
--- a/EXAMPLE/dlinsolx2.c
+++ b/EXAMPLE/dlinsolx2.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_ddefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/dlinsolx3.c b/EXAMPLE/dlinsolx3.c
index 0a82c7bbea362a2d..bc51680e3ddc205d 100644
--- a/EXAMPLE/dlinsolx3.c
+++ b/EXAMPLE/dlinsolx3.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_ddefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/sfgmr.c b/EXAMPLE/sfgmr.c
index f2428200f0b27040..1358b5c95c2c1ff2 100644
--- a/EXAMPLE/sfgmr.c
+++ b/EXAMPLE/sfgmr.c
@@ -33,6 +33,8 @@ For information on ITSOL contact saad@cs.umn.edu
 
 #define  epsmac  1.0e-16
 
+extern int scopy_(int *, float *, int *, float *, int *);
+extern void saxpy_(int *, float *, float *, int *, float *, int *);
 extern float sdot_(int *, float [], int *, float [], int *);
 extern float snrm2_(int *, float [], int *);
 
diff --git a/EXAMPLE/slinsolx.c b/EXAMPLE/slinsolx.c
index 32f1788b67bb3a28..9de609badc07c614 100644
--- a/EXAMPLE/slinsolx.c
+++ b/EXAMPLE/slinsolx.c
@@ -18,6 +18,8 @@ at the top-level directory.
  */
 #include "slu_sdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
     char           equed[1];
diff --git a/EXAMPLE/slinsolx1.c b/EXAMPLE/slinsolx1.c
index 2d9ab0875aba1ac6..c1726cb73f484747 100644
--- a/EXAMPLE/slinsolx1.c
+++ b/EXAMPLE/slinsolx1.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_sdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/slinsolx2.c b/EXAMPLE/slinsolx2.c
index aca9dc13b405b48a..ad4a06f8ed906723 100644
--- a/EXAMPLE/slinsolx2.c
+++ b/EXAMPLE/slinsolx2.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_sdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/slinsolx3.c b/EXAMPLE/slinsolx3.c
index cb3356cd48bd5df9..0aefbd90e698b992 100644
--- a/EXAMPLE/slinsolx3.c
+++ b/EXAMPLE/slinsolx3.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_sdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/sp_ienv.c b/EXAMPLE/sp_ienv.c
index 266b4eeb59f9ee99..2a8d99f48080aa0e 100644
--- a/EXAMPLE/sp_ienv.c
+++ b/EXAMPLE/sp_ienv.c
@@ -23,7 +23,7 @@ at the top-level directory.
  * File name:		sp_ienv.c
  * History:             Modified from lapack routine ILAENV
  */
-#include "slu_Cnames.h"
+#include "slu_sdefs.h"
 
 /*! \brief
 
diff --git a/EXAMPLE/superlu.c b/EXAMPLE/superlu.c
index fd42a6ad5ded236a..b32d7e697c76c8e4 100644
--- a/EXAMPLE/superlu.c
+++ b/EXAMPLE/superlu.c
@@ -20,7 +20,7 @@ at the top-level directory.
  */
 #include "slu_ddefs.h"
 
-main(int argc, char *argv[])
+int main(int argc, char *argv[])
 {
 /*
  * Purpose
diff --git a/EXAMPLE/zfgmr.c b/EXAMPLE/zfgmr.c
index 223a4f48ebe6f488..7d094dfbc0864d2c 100644
--- a/EXAMPLE/zfgmr.c
+++ b/EXAMPLE/zfgmr.c
@@ -33,6 +33,8 @@ For information on ITSOL contact saad@cs.umn.edu
 
 #define  epsmac  1.0e-16
 
+extern int zcopy_(int *, doublecomplex *, int *, doublecomplex *, int *);
+extern void zaxpy_(int *, doublecomplex *, doublecomplex *, int *, doublecomplex *, int *);
 extern void zdotc_(doublecomplex *, int *, doublecomplex [], int *, doublecomplex [], int *);
 extern double dznrm2_(int *, doublecomplex [], int *);
 
diff --git a/EXAMPLE/zlinsolx.c b/EXAMPLE/zlinsolx.c
index 0540461dc043e2bc..bb2f3851aa57584d 100644
--- a/EXAMPLE/zlinsolx.c
+++ b/EXAMPLE/zlinsolx.c
@@ -18,6 +18,8 @@ at the top-level directory.
  */
 #include "slu_zdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
     char           equed[1];
diff --git a/EXAMPLE/zlinsolx1.c b/EXAMPLE/zlinsolx1.c
index badbf94cc33ca410..780e87cf594b9b1f 100644
--- a/EXAMPLE/zlinsolx1.c
+++ b/EXAMPLE/zlinsolx1.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_zdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/zlinsolx2.c b/EXAMPLE/zlinsolx2.c
index 902c3535c3a905f5..579922433a7d2464 100644
--- a/EXAMPLE/zlinsolx2.c
+++ b/EXAMPLE/zlinsolx2.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_zdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*
diff --git a/EXAMPLE/zlinsolx3.c b/EXAMPLE/zlinsolx3.c
index 5080c03a34d6c7ae..a1763ed45ccbb028 100644
--- a/EXAMPLE/zlinsolx3.c
+++ b/EXAMPLE/zlinsolx3.c
@@ -20,6 +20,8 @@ at the top-level directory.
  */
 #include "slu_zdefs.h"
 
+#include <unistd.h>
+
 int main(int argc, char *argv[])
 {
 /*