Boost 1.65.1
Compiler: clang from android NDK
clang_version__ "5.0.300080 "
NDK version: 16.0.4442984
Build system: cmake (3.6.4111459)
Std librariy: libc++_static
Build machine: Ubuntu 16.04.3 LTS
Since Google introduced unified headers the following compile error occurs to build boost::filesystem for example Android Level 19:
clang-linux.compile.c++.without-pth bin.v2/libs/filesystem/build/clang-linux-android/release/link-static/target-os-android/threading-multi/operations.o
libs/filesystem/src/operations.cpp:1705:12: error: no member named 'truncate' in the global namespace
error(!BOOST_RESIZE_FILE(p.c_str(), size) ? BOOST_ERRNO : 0, p, ec,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libs/filesystem/src/operations.cpp:224:38: note: expanded from macro 'BOOST_RESIZE_FILE'
# define BOOST_RESIZE_FILE(P,SZ)(::truncate(P, SZ)== 0)
~~^
1 error generated.
"/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++" -c -x c++ -Qunused-arguments -std=c++11 -frtti -fexceptions -Oz -DNDEBUG -isysroot /android-sdk/ndk-bundle/sysroot --target=armv7-none-linux-androideabi --gcc-toolchain=/android-sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 -isystem /android-sdk/ndk-bundle/sysroot/usr/include -I/android-sdk/ndk-bundle/sources/cxx-stl/llvm-libc++/include -I/android-sdk/ndk-bundle/sources/android/support/include -I/android-sdk/ndk-bundle/sources/cxx-stl/llvm-libc++abi/include -O3 -Wno-inline -Wall -DBOOST_LOG_WITHOUT_SYSLOG -isystem /android-sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -D__ANDROID_API__=19 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -Qunused-arguments -DHAVE_PTHREADS -DBOOST_ALL_NO_LIB=1 -DBOOST_FILESYSTEM_STATIC_LINK=1 -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG -I"." -o "bin.v2/libs/filesystem/build/clang-linux-android/release/link-static/target-os-android/threading-multi/operations.o" "libs/filesystem/src/operations.cpp"
...failed clang-linux.compile.c++.without-pth bin.v2/libs/filesystem/build/clang-linux-android/release/link-static/target-os-android/threading-multi/operations.o...
Before they introduced the unified headers the header file unistd.h didn't care about the defines _FILE_OFFSET_BITS or __USE_FILE_OFFSET64. Here a snippit from unistd.h:
...
extern int lchown(const char *, uid_t, gid_t);
extern int truncate(const char *, off_t);
extern char *getcwd(char *, size_t);
extern int sync(void);
extern int close(int);
extern off_t lseek(int, off_t, int);
extern off64_t lseek64(int, off64_t, int);
extern ssize_t read(int, void *, size_t);
extern ssize_t write(int, const void *, size_t);
extern ssize_t pread(int, void *, size_t, off_t);
extern ssize_t pread64(int, void *, size_t, off64_t);
extern ssize_t pwrite(int, const void *, size_t, off_t);
extern ssize_t pwrite64(int, const void *, size_t, off64_t);
extern int dup(int);
extern int dup2(int, int);
extern int fcntl(int, int, ...);
extern int ioctl(int, int, ...);
extern int flock(int, int);
extern int fsync(int);
extern int fdatasync(int);
extern int ftruncate(int, off_t);
extern int ftruncate64(int, off64_t);
...
Since they introduced unified headers, unistd.h snippet:
...
#if defined(__USE_FILE_OFFSET64)
#if __ANDROID_API__ >= 21
int truncate(const char* __path, off_t __length) __RENAME(truncate64) __INTRODUCED_IN(21);
#endif /* __ANDROID_API__ >= 21 */
#if __ANDROID_API__ >= 12
ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset)
__overloadable __RENAME(pread64) __INTRODUCED_IN(12);
ssize_t pwrite(int __fd, const void* __buf, size_t __count, off_t __offset)
__overloadable __RENAME(pwrite64) __INTRODUCED_IN(12);
int ftruncate(int __fd, off_t __length) __RENAME(ftruncate64) __INTRODUCED_IN(12);
#endif /* __ANDROID_API__ >= 12 */
#else
int truncate(const char* __path, off_t __length);
ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset)
__overloadable __RENAME_CLANG(pread);
ssize_t pwrite(int __fd, const void* __buf, size_t __count, off_t __offset)
__overloadable __RENAME_CLANG(pwrite);
int ftruncate(int __fd, off_t __length);
#endif
#if __ANDROID_API__ >= 21
int truncate64(const char* __path, off64_t __length) __INTRODUCED_IN(21);
#endif /* __ANDROID_API__ >= 21 */
#if __ANDROID_API__ >= 12
ssize_t pread64(int __fd, void* __buf, size_t __count, off64_t __offset)
__INTRODUCED_IN(12) __overloadable __RENAME_CLANG(pread64);
ssize_t pwrite64(int __fd, const void* __buf, size_t __count, off64_t __offset)
__INTRODUCED_IN(12) __overloadable __RENAME_CLANG(pwrite64);
int ftruncate64(int __fd, off64_t __length) __INTRODUCED_IN(12);
#endif /* __ANDROID_API__ >= 12 */
...Now they care about the define __USE_FILE_OFFSET64 and truncate for 64 Bit is not implemented before Android API level 21.
We compile and use boost::filesystem for Android API level 19 long time ago and we didn't have any problems. So I decided to "if def" the define of __USE_FILE_OFFSET64 around (see snippet):
...
#if !(defined(__ANDROID__) && __ANDROID_API__ < 21)
// define 64-bit offset macros BEFORE including boost/config.hpp (see ticket #5355)
#if !(defined(__HP_aCC) && defined(_ILP32) && !defined(_STATVFS_ACPP_PROBLEMS_FIXED))
#define _FILE_OFFSET_BITS 64 // at worst, these defines may have no effect,
#endif
#if !defined(__PGI)
#define __USE_FILE_OFFSET64 // but that is harmless on Windows and on POSIX
// 64-bit systems or on 32-bit systems which don't have files larger
// than can be represented by a traditional POSIX/UNIX off_t type.
// OTOH, defining them should kick in 64-bit off_t's (and thus
// st_size)on 32-bit systems that provide the Large File
// Support (LFS)interface, such as Linux, Solaris, and IRIX.
// The defines are given before any headers are included to
// ensure that they are available to all included headers.
// That is required at least on Solaris, and possibly on other
// systems as well.
#else
#define _FILE_OFFSET_BITS 64
#endif
#endif
...to skip this so that we have the same behavior as before, I think.
I create a patch file but I will not create a pull request because I think this is not the right solution and you should decided if this is a proper fix or not. Then I can create a pull request, if needed.
I added the patch file and a preprocessor output of the compile error in operations.cpp
operations.ii.txt
android-boost-1_65_1-patches.patch.txt
You need some help or additional information, let me know.
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