mirror of git://sourceware.org/git/glibc.git
8f2e1830f2
This patch arranges for the glibc build to generate a header first-versions.h that defines macros for the earliest symbol version in which each public symbol (GLIBC_[0-9]* symbol version, name only uses C identifier characters) is available. This is used in sysdeps/ieee754/ldbl-opt/math-type-macros-double.h to replace the manually defined LDOUBLE_*_libm_version macros for various functions defined using type-generic templates, the purpose of which is to use in LONG_DOUBLE_COMPAT tests "was this function originally added before glibc supported long double != double on this platform?". As discussed in <https://sourceware.org/ml/libc-alpha/2016-12/msg00246.html>, I expect this to be useful more generally in reducing the amount of special-case code needed in ldbl-opt and ldbl-64-128. Tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * scripts/versions.awk: Generate first-versions.h. * sysdeps/ieee754/ldbl-opt/math-type-macros-double.h: Include <first-versions.h>. (LDOUBLE_cabsl_libm_version): Remove macro. (LDOUBLE_cargl_libm_version): Likewise. (LDOUBLE_cimagl_libm_version): Likewise. (LDOUBLE_conjl_libm_version): Likewise. (LDOUBLE_creall_libm_version): Likewise. (LDOUBLE_cacosl_libm_version): Likewise. (LDOUBLE_cacoshl_libm_version): Likewise. (LDOUBLE_ccosl_libm_version): Likewise. (LDOUBLE_ccoshl_libm_version): Likewise. (LDOUBLE_casinl_libm_version): Likewise. (LDOUBLE_csinl_libm_version): Likewise. (LDOUBLE_casinhl_libm_version): Likewise. (LDOUBLE_csinhl_libm_version): Likewise. (LDOUBLE_catanl_libm_version): Likewise. (LDOUBLE_catanhl_libm_version): Likewise. (LDOUBLE_ctanl_libm_version): Likewise. (LDOUBLE_ctanhl_libm_version): Likewise. (LDOUBLE_cexpl_libm_version): Likewise. (LDOUBLE_clogl_libm_version): Likewise. (LDOUBLE_cprojl_libm_version): Likewise. (LDOUBLE_csqrtl_libm_version): Likewise. (LDOUBLE_cpowl_libm_version): Likewise. (LDOUBLE_clog10l_libm_version): Likewise. (LDOUBLE___clog10l_libm_version): Likewise. (LDOUBLE_fdiml_libm_version): Likewise. (LDOUBLE_fmaxl_libm_version): Likewise. (LDOUBLE_fminl_libm_version): Likewise. (LDOUBLE_ilogbl_libm_version): Likewise. (LDOUBLE_nanl_libm_version): Likewise. [!M_LIBM_NEED_COMPAT] (M_LIBM_NEED_COMPAT): Use FIRST_VERSION_libm_* macros. [!declare_mgen_libm_compat] (declare_mgen_libm_compat): Likewise. * Makerules [$(build-shared) = yes && !avoid-generated] (before-compile): Add $(common-objpfx)first-versions.h. [$(build-shared) = yes && !avoid-generated] ($(common-objpfx)first-versions.h): New target. ($(common-objpfx)sysd-versions): Depend on and change to rule for building $(common-objpfx)versions.stmp. |
||
|---|---|---|
| .. | ||
| abi-versions.awk | ||
| abilist.awk | ||
| backport-support.sh | ||
| build-many-glibcs.py | ||
| check-c++-types.sh | ||
| check-execstack.awk | ||
| check-installed-headers.sh | ||
| check-local-headers.sh | ||
| check-localplt.awk | ||
| check-textrel.awk | ||
| config-uname.sh | ||
| config.guess | ||
| config.sub | ||
| cpp | ||
| cross-test-ssh.sh | ||
| documented.sh | ||
| evaluate-test.sh | ||
| firstversions.awk | ||
| gen-as-const.awk | ||
| gen-libc-abis | ||
| gen-libc-modules.awk | ||
| gen-posix-conf-vars.awk | ||
| gen-py-const.awk | ||
| gen-rrtypes.py | ||
| gen-sorted.awk | ||
| gen-tunables.awk | ||
| install-sh | ||
| lib-names.awk | ||
| list-fixed-bugs.py | ||
| list-sources.sh | ||
| localplt.awk | ||
| merge-test-results.sh | ||
| mkinstalldirs | ||
| move-if-change | ||
| output-format.sed | ||
| pylint | ||
| pylintrc | ||
| rellns-sh | ||
| soversions.awk | ||
| sysd-rules.awk | ||
| test-installation.pl | ||
| test_printers_common.py | ||
| test_printers_exceptions.py | ||
| update-abilist.sh | ||
| update-copyrights | ||
| versionlist.awk | ||
| versions.awk | ||