Missing unistd.h include in boost/libs/filesystem/src/unique_path.cpp

[Idar Tollefsen <idart@…>]

uname -a:
Linux <hostname> 4.2.0-1-amd64 #1 SMP Debian 4.2.1-2 (2015-09-27) x86_64 GNU/Linux

clang --version:
Debian clang version 3.7.0-2 (tags/RELEASE_370/final) (based on LLVM 3.7.0)
Target: x86_64-pc-linux-gnu
Thread model: posix

libc++ version:
#define _LIBCPP_VERSION 1101

Compiling:
clang++ -D_GNU_SOURCE -fno-omit-frame-pointer -Drestrict=restrict -pthread -O2 -g -Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -Wno-unused-function -Werror -Wformat-security -Woverloaded-virtual -Wwrite-strings -Wnon-virtual-dtor -Wno-mismatched-tags -Wno-tautological-constant-out-of-range-compare -Wno-gnu-designator -Wno-enum-conversion -Wno-unused-const-variable -fPIC -DSTDC_LIMIT_MACROS -std=gnu++11 -Wno-deprecated-declarations -stdlib=libc++ -c -o boost/libs/filesystem/src/_build/unique_path.o boost/libs/filesystem/src/unique_path.cpp

Error messages:

boost/libs/filesystem/src/unique_path.cpp:67:17: error: use of undeclared identifier 'read'

ssize_t n = read(file, buf, len - bytes_read);

boost/libs/filesystem/src/unique_path.cpp:70:7: error: use of undeclared identifier 'close'

close(file);

boost/libs/filesystem/src/unique_path.cpp:78:3: error: use of undeclared identifier 'close'

close(file);

3 errors generated.

Fix:
Include <unistd.h> if BOOST_POSIX_API and BOOST_HAS_UNISTD_H are defined.

[Beman Dawes]

Patch applied to develop branch. Will be merged to master after sufficient tests have cycled.

Thanks,

--Beman