Moved shell.cpp to ../common, borrowed and modified for FORCE_GUI from @bubnikv

Changed path in compile_wrapper, made makefile for linux with default paths pointed
at where they would be on Travis.

package/common/shell.cpp

@@ -1,16 +1,19 @@
 #include <EXTERN.h> // from the Perl distribution
 #include <perl.h> // from the Perl distribution
 
+
+#ifdef WIN32
 // Perl win32 specific includes, found in perl\\lib\\CORE\\win32.h
 // Defines the windows specific convenience RunPerl() function,
 // which is not available on other operating systems.
 #include <win32.h>
-// the standard Windows. include
+#include <wchar.h>
-//#include <Windows.h>
+#endif
+
 #include <cstdio>
 #include <cstdlib>
-#include <wchar.h>
 
+#ifdef WIN32
 int main(int argc, char **argv, char **env)
 {
 	
@@ -95,4 +98,25 @@ int main(int argc, char **argv, char **env)
 #endif
 	free(command_line);
 }
+#else
 
+int main(int argc, char **argv, char **env)
+{
+    PerlInterpreter *my_perl = perl_alloc();
+    if (my_perl == NULL) {
+        fprintf(stderr, "Cannot start perl interpreter. Exiting.\n");
+        return -1;
+    }
+    perl_construct(my_perl);
+
+#ifdef FORCE_GUI
+    char* command_line[] = { "slic3r", "slic3r.pl", "--gui" };
+#else
+    char* command_line[] = { "slic3r", "slic3r.pl" };
+#endif
+    perl_parse(my_perl, NULL, 3, command_line, (char **)NULL);
+    perl_run(my_perl);
+    perl_destruct(my_perl);
+    perl_free(my_perl);
+}
+#endif

package/linux/build_shell.mk

@@ -0,0 +1,31 @@
+src=../common/shell.cpp
+
+# override with environment variable
+CXX ?= g++
+
+# Path to perl header files
+INCLUDEDIR ?= ${HOME}/perl5/perlbrew/perls/slic3r-perl/lib/5.24.0/x86_64-linux-thread-multi/CORE
+
+# path to library files for perl
+LIBDIR ?= ${HOME}/perl5/perlbrew/perls/slic3r-perl/lib/5.24.0/x86_64-linux-thread-multi/CORE
+
+LIBS += -lperl -lpthread -lcrypt
+
+CXXFLAGS += -std=c++11 -static-libgcc -static-libstdc++ -I${INCLUDEDIR}
+LDFLAGS += -L${LIBDIR}
+
+.PHONY: all clean
+all: Slic3r Slic3r-console
+
+Slic3r: slic3r.o
+	${CXX} ${LDFLAGS} -o $@ $< ${LIBS}
+
+Slic3r-console: slic3r-console.o
+	${CXX} ${LDFLAGS} -o $@ $< ${LIBS}
+slic3r-console.o: ${src}
+	${CXX} -c ${CXXFLAGS} -o $@ $<
+slic3r.o: ${src}
+	${CXX} -c -DFORCE_GUI ${CXXFLAGS} -o $@ $<
+
+clean: 
+	rm *.o Slic3r*

package/win/compile_wrapper.ps1

@@ -8,10 +8,11 @@ if ($args[0])
 }
 
 $perllib = "-lperl$perlver"
+$shell_loc = "..\common\shell.cpp"
 
 windres slic3r.rc -O coff -o slic3r.res
-g++ -c -I'C:\strawberry\perl\lib\CORE\' shell.cpp -o slic3r.o
+g++ -c -I'C:\strawberry\perl\lib\CORE\' $shell_loc -o slic3r.o
-g++ -c -I'C:\strawberry\perl\lib\CORE\' -DFORCE_GUI shell.cpp -o slic3r-gui.o
+g++ -c -I'C:\strawberry\perl\lib\CORE\' -DFORCE_GUI $shell_loc -o slic3r-gui.o
 g++ -static-libgcc -static-libstdc++ -L'C:\strawberry\c\lib' -L'C:\strawberry\perl\bin' -L'C:\strawberry\perl\lib\CORE\' $perllib slic3r.o slic3r.res -o slic3r-console.exe | Write-Host
 g++ -static-libgcc -static-libstdc++ -L'C:\strawberry\c\lib' -mwindows -L'C:\strawberry\perl\bin' -L'C:\strawberry\perl\lib\CORE\' $perllib slic3r-gui.o slic3r.res -o slic3r.exe | Write-Host
 g++ -static-libgcc -static-libstdc++ -L'C:\strawberry\c\lib' -L'C:\strawberry\perl\bin' -L'C:\strawberry\perl\lib\CORE\' $perllib slic3r-gui.o slic3r.res -o slic3r-debug-console.exe | Write-Host