According to
https://docs.microsoft.com/fr-fr/windows/win32/fileio/naming-a-file
backslashes (with slashes) are a path separator, hence must no be
considered as an escape code.
The first fix, in argvsplit.c, disables this. But because of fragment_quote(),
the backslashes are doubled. Hence the second fix in fragment.c
With this pc file :
prefix=C:/Documents/msys2/opt/efl_64
libdir=${prefix}/lib
includedir=${prefix}/include
Name: eina
Description: efl: eina
Version: 1.24.99
Requires.private: iconv
Libs: -L${libdir} -leina -pthread -levil
Libs.private: -lpsapi -lole32 -lws2_32 -lsecur32 -luuid -lregex -lm
Cflags:-I${includedir}/eina-1 -I${includedir}/efl-1
-I${includedir}/eina-1/eina -pthread
pkgconf.exe --cflags eina
returns :
-IC:\Documents\msys2\opt\efl_64/include/eina-1
-IC:\Documents\msys2\opt\efl_64/include/efl-1
-IC:\Documents\msys2\opt\efl_64/include/eina-1/eina -pthread
-DWINICONV_CONST= -IC:\Documents\msys2\opt\ewpi_64/include
42b355310f