unistd: add include guards for header (#2590)

* unistd: add include guards for header

src/ivoc/pwman.cpp

@@ -41,7 +41,9 @@ void iv_display_scale(Coord, Coord);  // Make if fit into the screen
 char* hoc_back2forward(char*);
 #endif
 
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #define IOS_OUT std::ios::out
 
 #include <IV-look/kit.h>

src/nrniv/nrncore_write/utils/nrncore_utils.cpp

@@ -11,7 +11,9 @@
 #include "vrecitem.h"  // for nrnbbcore_vecplay_write
 #include "parse.hpp"
 #include <string>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <algorithm>
 #include <cerrno>
 #include <filesystem>

src/nrnoc/init.cpp

@@ -7,7 +7,9 @@
 #include <errno.h>
 #include <string.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include "section.h"
 #include "parse.hpp"
 #include "nrniv_mf.h"

src/nrnpython/rxd_intracellular.cpp

@@ -5,7 +5,9 @@
 #include "grids.h"
 #include "rxd.h"
 #include <nrnwrap_Python.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 
 #include <cmath>
 

src/oc/code2.cpp

@@ -7,7 +7,9 @@
 #include "hocparse.h"
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <ctype.h>
 #include <errno.h>
 #include "nrnfilewrap.h"

src/oc/fileio.cpp

@@ -4,7 +4,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <cstdarg>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include "hoc.h"
 #include "ocmisc.h"
 #include "hocstr.h"

src/oc/hoc.cpp

@@ -4,7 +4,9 @@
 #include "equation.h"
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <math.h>
 #include <errno.h>
 #include "parse.hpp"

src/oc/mswinprt.cpp

@@ -2,7 +2,9 @@
 
 #ifdef MINGW
 
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <windows.h>
 #include <stdio.h>
 #include <stdarg.h>

src/oc/scoprand.cpp

@@ -1,6 +1,8 @@
 #include <../../nrnconf.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 
 /* this was removed from the scopmath library since there could be
 multiple copies of the static value below. One in neuron.exe and the

src/parallel/bbsclimpi.cpp

@@ -4,7 +4,9 @@
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <InterViews/resource.h>
 #include "nrnpy.h"
 #include "oc2iv.h"

src/parallel/bbsdirectmpi.cpp

@@ -3,7 +3,9 @@
 #ifdef NRNMPI  // to end of file
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <InterViews/resource.h>
 #include "oc2iv.h"
 #include "bbs.h"

src/parallel/bbssrvmpi.cpp

@@ -2,7 +2,9 @@
 #include <nrnmpi.h>
 #ifdef NRNMPI  // to end of file
 #include <stdio.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include "bbssrv2mpi.h"
 #include "bbssrv.h"