Building and Installing HTSlib ============================== Requirements ============ Building HTSlib requires a few programs and libraries to be present. At least the following are required: GNU make C compiler (e.g. gcc or clang) In addition, building the configure script requires: autoheader autoconf Running the configure script uses awk, along with a number of standard UNIX tools (cat, cp, grep, mv, rm, sed, among others). Almost all installations will have these already. Running the test harness (make test) uses: bash perl HTSlib uses the following external libraries. Building requires both the library itself, and include files needed to compile code that uses functions from the library. Note that some Linux distributions put include files in a development ('-dev' or '-devel') package separate from the main library. libz (required) libbz2 (required, unless configured with --disable-bz2) liblzma (required, unless configured with --disable-lzma) libcurl (optional, but strongly recommended) libcrypto (optional for Amazon S3 support; not needed on MacOS) Disabling libbzip2 and liblzma will make some CRAM files unreadable, so is not recommended. Using libcurl provides HTSlib with better network protocol support, for example it enables the use of https:// URLs. It is also required if direct access to Amazon S3 or Google Cloud Storage is enabled. Amazon S3 support requires an HMAC function to calculate a message authentication code. On MacOS, the CCHmac function from the standard library is used. Systems that do not have CChmac will get this from libcrypto. libcrypto is part of OpenSSL or one of its derivatives (LibreSSL or BoringSSL). On Microsoft Windows we recommend use of Mingw64/Msys2. Note that currently for the test harness to work you will need to override the test temporary directory with e.g.: make check TEST_OPTS="-t C:/msys64/tmp/_" Whilst the code may work on Windows with other environments, these have not be verified. Building Configure ================== This step is only needed if configure.ac has been changed, or if configure does not exist (for example, when building from a git clone). The configure script and config.h.in can be built by running: autoheader autoconf If you have a full GNU autotools install, you can alternatively run: autoreconf Basic Installation ================== To build and install HTSlib, 'cd' to the htslib-1.x directory containing the package's source and type the following commands: ./configure make make install The './configure' command checks your build environment and allows various optional functionality to be enabled (see Configuration below). If you don't want to select any optional functionality, you may wish to omit configure and just type 'make; make install' as for previous versions of HTSlib. However if the build fails you should run './configure' as it can diagnose the common reasons for build failures. The 'make' command builds the HTSlib library and and various useful utilities: bgzip, htsfile, and tabix. If compilation fails you should run './configure' as it can diagnose problems with your build environment that cause build failures. The 'make install' command installs the libraries, library header files, utilities, several manual pages, and a pkgconfig file to /usr/local. The installation location can be changed by configuring with --prefix=DIR or via 'make prefix=DIR install' (see Installation Locations below). Configuration ============= By default, './configure' examines your build environment, checking for requirements such as the zlib development files, and arranges for a plain HTSlib build. The following configure options can be used to enable various features and specify further optional external requirements: --enable-plugins Use plugins to implement exotic file access protocols and other specialised facilities. This enables such facilities to be developed and packaged outwith HTSlib, and somewhat isolates HTSlib-using programs from their library dependencies. By default (or with --disable-plugins), any enabled pluggable facilities (such as libcurl file access) are built directly within HTSlib. The repository contains several additional plugins, including the iRODS () file access plugin previously distributed with HTSlib. --with-plugin-dir=DIR Specifies the directory into which plugins built while building HTSlib should be installed; by default, LIBEXECDIR/htslib. --with-plugin-path=DIR:DIR:DIR... Specifies the list of directories that HTSlib will search for plugins. By default, only the directory specified via --with-plugin-dir will be searched; you can use --with-plugin-path='DIR:$(plugindir):DIR' and so on to cause additional directories to be searched. --enable-libcurl Use libcurl () to implement network access to remote files via FTP, HTTP, HTTPS, etc. By default, HTSlib uses its own simple networking code to provide access via FTP and HTTP only. --enable-gcs Implement network access to Google Cloud Storage. By default or with --enable-gcs=check, this is enabled when libcurl is enabled. --enable-s3 Implement network access to Amazon AWS S3. By default or with --enable-s3=check, this is enabled when libcurl is enabled. --disable-bz2 Bzip2 is an optional compression codec format for CRAM, included in HTSlib by default. It can be disabled with --disable-bz2, but be aware that not all CRAM files may be possible to decode. --disable-lzma LZMA is an optional compression codec for CRAM, included in HTSlib by default. It can be disabled with --disable-lzma, but be aware that not all CRAM files may be possible to decode. The configure script also accepts the usual options and environment variables for tuning installation locations and compilers: type './configure --help' for details. For example, ./configure CC=icc --prefix=/opt/icc-compiled would specify that HTSlib is to be built with icc and installed into bin, lib, etc subdirectories under /opt/icc-compiled. Installation Locations ====================== By default, 'make install' installs HTSlib libraries under /usr/local/lib, HTSlib header files under /usr/local/include, utility programs under /usr/local/bin, etc. (To be precise, the header files are installed within a fixed 'htslib' subdirectory under the specified .../include location.) You can specify a different location to install HTSlib by configuring with --prefix=DIR or specify locations for particular parts of HTSlib by configuring with --libdir=DIR and so on. Type './configure --help' for the full list of such install directory options. Alternatively you can specify different locations at install time by typing 'make prefix=DIR install' or 'make libdir=DIR install' and so on. Consult the list of prefix/exec_prefix/etc variables near the top of the Makefile for the full list of such variables that can be overridden. You can also specify a staging area by typing 'make DESTDIR=DIR install', possibly in conjunction with other --prefix or prefix=DIR settings. For example, make DESTDIR=/tmp/staging prefix=/opt would install into bin, lib, etc subdirectories under /tmp/staging/opt.