'--enable-lock-elision=yes'
Enable lock elision for pthread mutexes by default.
+'--enable-stack-protector'
+'--enable-stack-protector=strong'
+'--enable-stack-protector=all'
+ Compile the C library and all other parts of the glibc package
+ (including the threading and math libraries, NSS modules, and
+ transliteration modules) using the GCC '-fstack-protector',
+ '-fstack-protector-strong' or '-fstack-protector-all' options to
+ detect stack overruns. Only the dynamic linker and a small number
+ of routines called directly from assembler are excluded from this
+ protection.
+
'--enable-pt_chown'
The file 'pt_chown' is a helper binary for 'grantpt' (*note
Pseudo-Terminals: Allocation.) that is installed setuid root to fix
By default for x86_64, the GNU C Library is built with the vector
math library. Use this option to disable the vector math library.
+'--enable-tunables'
+ Tunables support allows additional library parameters to be
+ customized at runtime. This is an experimental feature and affects
+ startup time and is thus disabled by default. This option can take
+ the following values:
+
+ 'no'
+ This is the default if the option is not passed to configure.
+ This disables tunables.
+
+ 'yes'
+ This is the default if the option is passed to configure.
+ This enables tunables and selects the default frontend
+ (currently 'valstring').
+
+ 'valstring'
+ This enables tunables and selects the 'valstring' frontend for
+ tunables. This frontend allows users to specify tunables as a
+ colon-separated list in a single environment variable
+ 'GLIBC_TUNABLES'.
+
'--build=BUILD-SYSTEM'
'--host=HOST-SYSTEM'
These options are for cross-compiling. If you specify both options
make the test run stop and exit with an error status immediately when a
failure occurs.
+ The GNU C Library pretty printers come with their own set of scripts
+for testing, which run together with the rest of the testsuite through
+'make check'. These scripts require the following tools to run
+successfully:
+
+ * Python 2.7.6/3.4.3 or later
+
+ Python is required for running the printers' test scripts.
+
+ * PExpect 4.0
+
+ The printer tests drive GDB through test programs and compare its
+ output to the printers'. PExpect is used to capture the output of
+ GDB, and should be compatible with the Python version in your
+ system.
+
+ * GDB 7.8 or later with support for Python 2.7.6/3.4.3 or later
+
+ GDB itself needs to be configured with Python support in order to
+ use the pretty printers. Notice that your system having Python
+ available doesn't imply that GDB supports it, nor that your
+ system's Python and GDB's have the same version.
+
+If these tools are absent, the printer tests will report themselves as
+'UNSUPPORTED'. Notice that some of the printer tests require the GNU C
+Library to be compiled with debugging symbols.
+
To format the 'GNU C Library Reference Manual' for printing, type
'make dvi'. You need a working TeX installation to do this. The
distribution builds the on-line formatted version of the manual, as Info
better code. As of release time, GCC 5.3 is the newest compiler
verified to work to build the GNU C Library.
+ For multi-arch support it is recommended to use a GCC which has
+ been built with support for GNU indirect functions. This ensures
+ that correct debugging information is generated for functions
+ selected by IFUNC resolvers. This support can either be enabled by
+ configuring GCC with '--enable-gnu-indirect-function', or by
+ enabling it by default by setting 'default_gnu_indirect_function'
+ variable for a particular architecture in the GCC source file
+ 'gcc/config.gcc'.
+
You can use whatever compiler you like to compile programs that use
the GNU C Library.