fix build on Solaris 10

Solaris 10 is too old for POSIX.2008, thus wcsdup() is missing

CMakeLists.txt

@@ -1,8 +1,12 @@
 # 2016, Georg Sauthoff <mail@georg.so>
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project(somake C CXX)
 
+include(CheckFunctionExists)
+check_function_exists(wcsdup HAVE_WCSDUP)
+configure_file(config.h.in config.h)
+
 add_library(mksh STATIC
   lib/mksh/dosys.cc lib/mksh/globals.cc lib/mksh/i18n.cc lib/mksh/macro.cc
   lib/mksh/misc.cc  lib/mksh/mksh.cc    lib/mksh/read.cc
@@ -25,12 +29,14 @@ add_executable(${PROJECT_NAME}
   bin/main.cc     bin/misc.cc    bin/nse_printdep.cc bin/parallel.cc
   bin/pmake.cc    bin/read.cc    bin/read2.cc        bin/rep.cc
   bin/state.cc
-  comp/progname.c
+  lib/bsd/bsd.cc
+  comp/progname.c comp/wcsdup.c
 )
 
 set_property(TARGET ${PROJECT_NAME} mksh vroot PROPERTY INCLUDE_DIRECTORIES
   ${CMAKE_CURRENT_SOURCE_DIR}/include
   ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}
 )
 
 target_link_libraries(${PROJECT_NAME}

README.md

@@ -267,6 +267,11 @@ Although those changes target Linux, they aren't really Linux
 specific. That means that the ported make should also compile on
 other modern [POSIXy][posix] operating systems.
 
+So far, the port was successfully tested under:
+
+- Fedora 23/x86-64
+- Solaris 10/SPARC
+
 
 ## Naming
 
@@ -306,6 +311,14 @@ differently, e.g.:
     -- Installing: dest/usr/bin/somake
     [..]
 
+### Tweaks
+
+If you are compiling on a legacy platform with ancient libraries
+you may need to tweak the cmake call a little bit. For example,
+to compile with GCC on a Solaris 10 system:
+
+    $ CC=gcc CXX=g++ LDFLAGS='-lnsl /opt/csw/lib/libintl.so.8' \
+        cmake -DCMAKE_BUILD_TYPE=Release ../somake
 
 ### Manual Installation
 
@@ -329,6 +342,7 @@ the following order:
 5. `/usr/share/lib/make/make.rules`
 6. `/etc/default/make.rules`
 
+
 ## License
 
 Perhaps not required by the CDDL, but I license my changes

bin/read.cc

@@ -44,6 +44,7 @@
 #include <libintl.h>
 
 #include <comp/progname.h>
+#include <comp/wcsdup.h>
 
 /*
  * typedefs & structs

bin/read2.cc

@@ -40,6 +40,7 @@
 #include <libintl.h>
 
 #include <comp/progname.h>
+#include <comp/wcsdup.h>
 
 /*
  * Defined macros

bin/rep.cc

@@ -36,6 +36,8 @@
 #include <mksh/misc.h>		/* retmem() */
 #include <vroot/report.h>	/* NSE_DEPINFO */
 
+#include <comp/wcsdup.h>
+
 /*
  * Static variables
  */

comp/wcsdup.c

@@ -0,0 +1,16 @@
+// 2016, Georg Sauthoff <mail@georg.so>, CDDL and WTFPL
+#include "wcsdup.h"
+
+#ifndef HAVE_WCSDUP
+
+  #include <stdlib.h>
+
+  // this function is part of POSIX.2008
+  wchar_t * wcsdup(const wchar_t *s)
+  {
+    size_t  n = wcslen(s) + 1;
+    wchar_t r = malloc(n * sizeof(wchar_t));
+    return  r ? return wmemcpy(r, s, n) : 0;
+}
+
+#endif

comp/wcsdup.h

@@ -0,0 +1,19 @@
+// 2016, Georg Sauthoff <mail@georg.so>, CDDL
+#ifndef COMPAT_WCSDUP_H
+#define COMPAT_WCSDUP_H
+
+#include <wchar.h>
+
+#include "config.h"
+
+#ifndef HAVE_WCSDUP
+  #if defined(__cplusplus)
+  extern "C" {
+  #endif
+    wchar_t * wcsdup (const wchar_t *s);
+  #if defined(__cplusplus)
+  }
+  #endif
+#endif
+
+#endif

config.h.in

@@ -0,0 +1,7 @@
+// 2016, Georg Sauthoff <mail@georg.so>, CDDL and WTFPL
+#ifndef SOMAKE_CONFIG_H
+#define SOMAKE_CONFIG_H
+
+#cmakedefine HAVE_WCSDUP 1
+
+#endif

lib/bsd/bsd.cc

@@ -23,6 +23,7 @@
  * Use is subject to license terms.
  */
 
+#if defined(__sun)
 
 #include <signal.h>
 
@@ -71,3 +72,5 @@ bsd_signals (void)
 
   return;
 }
+
+#endif

lib/mksh/macro.cc

@@ -41,6 +41,8 @@
 
 #include <libintl.h>
 
+#include <comp/wcsdup.h>
+
 /*
  * File table of contents
  */