mkdeps uses system() thus a shell to execute cc.
it doesn't work if you have something like
CFLAGS += -DMBEDTLS_USER_CONFIG_FILE="<mbedtls/user_config.h>"
because the shell interprets "<" as a redirect.
to fix it, we should do either
* make it shell-quote arguments
* or, stop using system()
this commit implements the former.
some platforms provide easy ways to do the former.
eg. https://netbsd.gw.com/cgi-bin/man-cgi?shquote++NetBSD-current
but unfortunately none of them seems available widely.
i guess the latter approach is more common.
eg. 4464250282/usr.bin/mkdep/mkdep.c (L137-L154)
but i might be a burden for windows. (i don't know)
tools/configure.c: Add missing '\n' in printf statement
tools/configure.c: Add missed -g option to getopt() string
tools/configure.c and tools/configure.sh: Fix Windows native pre-build kconfig-conf incompability. Looks like prebuilt Windows native kconfig-conf interprets "..\apps" as "..apps" (possibly '\a' as escape-sequence) so expand winnative path to double-backslashed variant "..\\apps".
tools/mkdeps.c: Fix '\0' missing in MinGW. Implicit bug. There are 2 cases.
1. Under Linux. The code works as planned: '\n' is always replaced with '\0' due to sprintf fills n-1 bytes and reaches buffer length limit.
2. Under Windows/MinGW. There is memory corruption. Seems like it`s a bug inside MinGW/snprintf. Snprintf fills consecutively "oldbase",' ',"str",'\n', but does not inserts trailing '\0' instead of '\n'. And when next append() occurs, strlen() returns garbage-appended "oldbase".
So the fix just removes '\n' and reserves space for '\0'.
tools/link.bat: Fix .fakelink creation
configs/Makefile and tools/Config.mk: Move single file copy to the new function COPYFILE. This fixes the Windows native build case when there is no cp or cp does not recognize Windows paths.
