# PhysicsFS; a portable, flexible file i/o abstraction.
# Copyright (C) 2007  Ryan C. Gordon.
#
# This file is modified for internal use.
#
# TODO: make it use a more recent zlib
#
# Please see the file LICENSE.txt in the source's root directory.

CMAKE_MINIMUM_REQUIRED(VERSION 2.4)

PROJECT(PhysicsFS)
SET(PHYSFS_VERSION 2.0.3)

# Increment this if/when we break backwards compatibility.
SET(PHYSFS_SOVERSION 1)

# I hate that they define "WIN32" ... we're about to move to Win64...I hope!
IF(WIN32 AND NOT WINDOWS)
    SET(WINDOWS TRUE)
ENDIF(WIN32 AND NOT WINDOWS)

# Bleh, let's do it for "APPLE" too.
IF(APPLE AND NOT MACOSX)
    SET(MACOSX TRUE)
ENDIF(APPLE AND NOT MACOSX)

# For now, Haiku and BeOS are the same, as far as the build system cares.
IF(HAIKU AND NOT BEOS)
    SET(BEOS TRUE)
ENDIF(HAIKU AND NOT BEOS)

INCLUDE(CheckIncludeFile)
INCLUDE(CheckLibraryExists)
INCLUDE(CheckCSourceCompiles)

INCLUDE_DIRECTORIES(.)
#INCLUDE_DIRECTORIES(platform)
#INCLUDE_DIRECTORIES(archivers)

IF(MACOSX)
    # Fallback to older OS X on PowerPC to support wider range of systems...
    IF(CMAKE_OSX_ARCHITECTURES MATCHES ppc)
        ADD_DEFINITIONS(-DMAC_OS_X_VERSION_MIN_REQUIRED=1020)
        SET(OTHER_LDFLAGS ${OTHER_LDFLAGS} " -mmacosx-version-min=10.2")
    ENDIF(CMAKE_OSX_ARCHITECTURES MATCHES ppc)

    # Need these everywhere...
    ADD_DEFINITIONS(-fno-common)
    SET(OTHER_LDFLAGS ${OTHER_LDFLAGS} " -framework Carbon -framework IOKit")
ENDIF(MACOSX)

# Add some gcc-specific command lines.
IF(CMAKE_COMPILER_IS_GNUCC)
    # Always build with debug symbols...you can strip it later.
    ADD_DEFINITIONS(-g -pipe -Werror -fsigned-char)

    # Stupid BeOS generates warnings in the system headers.
    IF(NOT BEOS)
        ADD_DEFINITIONS(-Wall)
    ENDIF(NOT BEOS)

    CHECK_C_SOURCE_COMPILES("
        #if ((defined(__GNUC__)) && (__GNUC__ >= 4))
        int main(int argc, char **argv) { int is_gcc4 = 1; return 0; }
        #else
        #error This is not gcc4.
        #endif
    " PHYSFS_IS_GCC4)

    IF(PHYSFS_IS_GCC4)
        # Not supported on several operating systems at this time.
        IF(NOT OS2 AND NOT SOLARIS AND NOT WINDOWS)
             ADD_DEFINITIONS(-fvisibility=hidden)
        ENDIF(NOT OS2 AND NOT SOLARIS AND NOT WINDOWS)
    ENDIF(PHYSFS_IS_GCC4)
ENDIF(CMAKE_COMPILER_IS_GNUCC)

IF(MSVC)
    # VS.NET 8.0 got really really anal about strcpy, etc, which even if we
    #  cleaned up our code, zlib, etc still use...so disable the warning.
    ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS=1)
ENDIF(MSVC)

# Basic chunks of source code ...

SET(ZLIB_SRCS
    zlib123/adler32.c
    zlib123/compress.c
    zlib123/crc32.c
    zlib123/deflate.c
    zlib123/gzio.c
    zlib123/infback.c
    zlib123/inffast.c
    zlib123/inflate.c
    zlib123/inftrees.c
    zlib123/trees.c
    zlib123/uncompr.c
    zlib123/zutil.c
)

SET(LZMA_SRCS
    lzma/C/7zCrc.c
    lzma/C/Archive/7z/7zBuffer.c
    lzma/C/Archive/7z/7zDecode.c
    lzma/C/Archive/7z/7zExtract.c
    lzma/C/Archive/7z/7zHeader.c
    lzma/C/Archive/7z/7zIn.c
    lzma/C/Archive/7z/7zItem.c
    lzma/C/Archive/7z/7zMethodID.c
    lzma/C/Compress/Branch/BranchX86.c
    lzma/C/Compress/Branch/BranchX86_2.c
    lzma/C/Compress/Lzma/LzmaDecode.c
)

IF(BEOS)
    # We add this explicitly, since we don't want CMake to think this
    #  is a C++ project unless we're on BeOS.
    SET(PHYSFS_BEOS_SRCS platform/beos.cpp)
    FIND_LIBRARY(BE_LIBRARY be)
    FIND_LIBRARY(ROOT_LIBRARY root)
    SET(OPTIONAL_LIBRARY_LIBS ${OPTIONAL_LIBRARY_LIBS} ${BE_LIBRARY} ${ROOT_LIBRARY})
ENDIF(BEOS)

# Almost everything is "compiled" here, but things that don't apply to the
#  build are #ifdef'd out. This is to make it easy to embed PhysicsFS into
#  another project or bring up a new build system: just compile all the source
#  code and #define the things you want.
SET(PHYSFS_SRCS
    physfs.c
    physfs_byteorder.c
    physfs_unicode.c
    platform/os2.c
    platform/pocketpc.c
    platform/posix.c
    platform/unix.c
    platform/macosx.c
    platform/windows.c
    archivers/dir.c
    archivers/grp.c
    archivers/hog.c
    archivers/lzma.c
    archivers/mvl.c
    archivers/qpak.c
    archivers/wad.c
    archivers/zip.c
    ${PHYSFS_BEOS_SRCS}
)

# platform layers ...

IF(UNIX)
    IF(BEOS)
        SET(PHYSFS_HAVE_CDROM_SUPPORT TRUE)
        SET(PHYSFS_HAVE_THREAD_SUPPORT TRUE)
        SET(HAVE_PTHREAD_H TRUE)
    ELSE(BEOS)
        # !!! FIXME
        #  AC_DEFINE([PHYSFS_HAVE_LLSEEK], 1, [define if we have llseek])
        CHECK_INCLUDE_FILE(sys/ucred.h HAVE_UCRED_H)
        IF(HAVE_UCRED_H)
            ADD_DEFINITIONS(-DPHYSFS_HAVE_SYS_UCRED_H=1)
            SET(PHYSFS_HAVE_CDROM_SUPPORT TRUE)
        ENDIF(HAVE_UCRED_H)

        CHECK_INCLUDE_FILE(mntent.h HAVE_MNTENT_H)
        IF(HAVE_MNTENT_H)
            ADD_DEFINITIONS(-DPHYSFS_HAVE_MNTENT_H=1)
            SET(PHYSFS_HAVE_CDROM_SUPPORT TRUE)
        ENDIF(HAVE_MNTENT_H)

        CHECK_INCLUDE_FILE(pthread.h HAVE_PTHREAD_H)
        IF(HAVE_PTHREAD_H)
            SET(PHYSFS_HAVE_THREAD_SUPPORT TRUE)
        ENDIF(HAVE_PTHREAD_H)

        FIND_LIBRARY(PTHREAD_LIBRARY pthread)
        IF(PTHREAD_LIBRARY)
            SET(OPTIONAL_LIBRARY_LIBS ${OPTIONAL_LIBRARY_LIBS} ${PTHREAD_LIBRARY})
        ENDIF(PTHREAD_LIBRARY)
    ENDIF(BEOS)
ENDIF(UNIX)

IF(WINDOWS)
    SET(PHYSFS_HAVE_CDROM_SUPPORT TRUE)
    SET(PHYSFS_HAVE_THREAD_SUPPORT TRUE)
ENDIF(WINDOWS)

IF(NOT PHYSFS_HAVE_CDROM_SUPPORT)
    ADD_DEFINITIONS(-DPHYSFS_NO_CDROM_SUPPORT=1)
    MESSAGE(WARNING " ***")
    MESSAGE(WARNING " *** There is no CD-ROM support in this build!")
    MESSAGE(WARNING " *** PhysicsFS will just pretend there are no discs.")
    MESSAGE(WARNING " *** This may be fine, depending on how PhysicsFS is used,")
    MESSAGE(WARNING " ***   but is this what you REALLY wanted?")
    MESSAGE(WARNING " *** (Maybe fix CMakeLists.txt, or write a platform driver?)")
    MESSAGE(WARNING " ***")
ENDIF(NOT PHYSFS_HAVE_CDROM_SUPPORT)

IF(PHYSFS_HAVE_THREAD_SUPPORT)
    ADD_DEFINITIONS(-D_REENTRANT -D_THREAD_SAFE)
ELSE(PHYSFS_HAVE_THREAD_SUPPORT)
    ADD_DEFINITIONS(-DPHYSFS_NO_THREAD_SUPPORT=1)
    MESSAGE(WARNING " ***")
    MESSAGE(WARNING " *** There is no thread support in this build!")
    MESSAGE(WARNING " *** PhysicsFS will NOT be reentrant!")
    MESSAGE(WARNING " *** This may be fine, depending on how PhysicsFS is used,")
    MESSAGE(WARNING " ***   but is this what you REALLY wanted?")
    MESSAGE(WARNING " *** (Maybe fix CMakeLists.txt, or write a platform driver?)")
    MESSAGE(WARNING " ***")
ENDIF(PHYSFS_HAVE_THREAD_SUPPORT)

CHECK_INCLUDE_FILE(assert.h HAVE_ASSERT_H)
IF(HAVE_ASSERT_H)
    ADD_DEFINITIONS(-DHAVE_ASSERT_H=1)
ENDIF(HAVE_ASSERT_H)

# Archivers ...

OPTION(PHYSFS_ARCHIVE_ZIP "Enable ZIP support" TRUE)
IF(PHYSFS_ARCHIVE_ZIP)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_ZIP=1)
    SET(PHYSFS_NEED_ZLIB TRUE)
ENDIF(PHYSFS_ARCHIVE_ZIP)

OPTION(PHYSFS_ARCHIVE_7Z "Enable 7zip support" TRUE)
IF(PHYSFS_ARCHIVE_7Z)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_7Z=1)
    # !!! FIXME: rename to 7z.c?
    SET(PHYSFS_SRCS ${PHYSFS_SRCS} ${LZMA_SRCS})
ENDIF(PHYSFS_ARCHIVE_7Z)

OPTION(PHYSFS_ARCHIVE_GRP "Enable Build Engine GRP support" TRUE)
IF(PHYSFS_ARCHIVE_GRP)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_GRP=1)
ENDIF(PHYSFS_ARCHIVE_GRP)

OPTION(PHYSFS_ARCHIVE_WAD "Enable Doom WAD support" TRUE)
IF(PHYSFS_ARCHIVE_WAD)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_WAD=1)
ENDIF(PHYSFS_ARCHIVE_WAD)

OPTION(PHYSFS_ARCHIVE_HOG "Enable Descent I/II HOG support" TRUE)
IF(PHYSFS_ARCHIVE_HOG)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_HOG=1)
ENDIF(PHYSFS_ARCHIVE_HOG)

OPTION(PHYSFS_ARCHIVE_MVL "Enable Descent I/II MVL support" TRUE)
IF(PHYSFS_ARCHIVE_MVL)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_MVL=1)
ENDIF(PHYSFS_ARCHIVE_MVL)

OPTION(PHYSFS_ARCHIVE_QPAK "Enable Quake I/II QPAK support" TRUE)
IF(PHYSFS_ARCHIVE_QPAK)
    ADD_DEFINITIONS(-DPHYSFS_SUPPORTS_QPAK=1)
ENDIF(PHYSFS_ARCHIVE_QPAK)

INCLUDE_DIRECTORIES(zlib123)
ADD_DEFINITIONS(-DZ_PREFIX=1)
SET(PHYSFS_SRCS ${PHYSFS_SRCS} ${ZLIB_SRCS})

ADD_LIBRARY(physfs STATIC ${PHYSFS_SRCS})
SET_TARGET_PROPERTIES(physfs PROPERTIES OUTPUT_NAME "physfs")
SET(PHYSFS_LIB_TARGET physfs)

# end of CMakeLists.txt ...