#101 Mingw - Cross-Compile

[Danial Chitnis]

The cross compile install code here has errors, also doesn't seem to be necessary anymore. Instead Mingw64 can compile the code "ideally" with no modifications to the Linux build. To achieve a successful build with --disable debug and --enable openmp the following patches are needed:

• <Windows.h> to <windows.h> (lower case) in get_avail_mem_size.c, get_phys_mem_size.c and get_resident_set_size.c
• In get_resident_set_size.c, the compiler mistakenly tries to compile HAVE__PROC_MEMINFO in getPeakRSS(), hence generating an error. This can be bypassed by returning 0. It seems that /proc/meminfo is hardcoded into autoconf rather than being platform dependant which is causing a problem in cross compile builds (including WASM )
• AC_FUNC_MALLOC and AC_FUNC_REALLOC need to be commented in configure.ac due to a problem with Mingw64. (not related to ngspice). This can be corrected using a case statement.
• Unfortunatly, Xspice doesn't cross-compile due to its convoluted build process.

build commands are:

$>mingw64-configure ../configure --disable-debug --enable-openmp
$>mingw64-make

[Holger Vogt]

Thanks for the patch suggestions:
<windows.h> to <windows.h> done (git branch pre-master)</windows.h></windows.h>

AC_FUNC_MALLOC and AC_FUNC_REALLOC are removed from configure.ac

HAVE__PROC_MEMINFO The availability of proc/meminfo is checked in configure.ac, line 646