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Create and use first-versions.h with macros for function symbol versions.
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.
This commit is contained in:
Joseph Myers
parent
332e01c627
commit
8f2e1830f2
44
ChangeLog
44
ChangeLog
@ -1,3 +1,47 @@
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2017-05-19 Joseph Myers <joseph@codesourcery.com>
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* scripts/versions.awk: Generate first-versions.h.
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* sysdeps/ieee754/ldbl-opt/math-type-macros-double.h: Include
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<first-versions.h>.
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(LDOUBLE_cabsl_libm_version): Remove macro.
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(LDOUBLE_cargl_libm_version): Likewise.
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(LDOUBLE_cimagl_libm_version): Likewise.
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(LDOUBLE_conjl_libm_version): Likewise.
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(LDOUBLE_creall_libm_version): Likewise.
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(LDOUBLE_cacosl_libm_version): Likewise.
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(LDOUBLE_cacoshl_libm_version): Likewise.
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(LDOUBLE_ccosl_libm_version): Likewise.
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(LDOUBLE_ccoshl_libm_version): Likewise.
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(LDOUBLE_casinl_libm_version): Likewise.
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(LDOUBLE_csinl_libm_version): Likewise.
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(LDOUBLE_casinhl_libm_version): Likewise.
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(LDOUBLE_csinhl_libm_version): Likewise.
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(LDOUBLE_catanl_libm_version): Likewise.
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(LDOUBLE_catanhl_libm_version): Likewise.
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(LDOUBLE_ctanl_libm_version): Likewise.
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(LDOUBLE_ctanhl_libm_version): Likewise.
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(LDOUBLE_cexpl_libm_version): Likewise.
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(LDOUBLE_clogl_libm_version): Likewise.
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(LDOUBLE_cprojl_libm_version): Likewise.
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(LDOUBLE_csqrtl_libm_version): Likewise.
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(LDOUBLE_cpowl_libm_version): Likewise.
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(LDOUBLE_clog10l_libm_version): Likewise.
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(LDOUBLE___clog10l_libm_version): Likewise.
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(LDOUBLE_fdiml_libm_version): Likewise.
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(LDOUBLE_fmaxl_libm_version): Likewise.
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(LDOUBLE_fminl_libm_version): Likewise.
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(LDOUBLE_ilogbl_libm_version): Likewise.
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(LDOUBLE_nanl_libm_version): Likewise.
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[!M_LIBM_NEED_COMPAT] (M_LIBM_NEED_COMPAT): Use
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FIRST_VERSION_libm_* macros.
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[!declare_mgen_libm_compat] (declare_mgen_libm_compat): Likewise.
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* Makerules [$(build-shared) = yes && !avoid-generated]
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(before-compile): Add $(common-objpfx)first-versions.h.
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[$(build-shared) = yes && !avoid-generated]
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($(common-objpfx)first-versions.h): New target.
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($(common-objpfx)sysd-versions): Depend on and change to rule for
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building $(common-objpfx)versions.stmp.
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2017-05-18 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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* rt/Makefile (CFLAGS-mq_timedsend.c): New flag.
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13
Makerules
13
Makerules
@ -105,6 +105,11 @@ $(common-objpfx)%.latest: $(common-objpfx)abi-versions.h
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sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \
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$(common-objpfx)abi-versions.h > $@T
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mv -f $@T $@
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# first-versions.h provides macros used in various symbol versioning
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# macro calls.
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before-compile := $(common-objpfx)first-versions.h $(before-compile)
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$(common-objpfx)first-versions.h: $(common-objpfx)versions.stmp
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endif # avoid-generated
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endif # $(build-shared) = yes
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@ -458,7 +463,8 @@ $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
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$(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
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$(wildcard $(sysdirs:%=%/Versions)) \
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$(sysd-versions-force)
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$(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
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$(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
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$(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
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$(common-objpfx)Versions.v \
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$(..)scripts/versions.awk
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( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
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@ -466,8 +472,9 @@ $(common-objpfx)sysd-versions: $(common-objpfx)Versions.all \
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| LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
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-v move_if_change='$(move-if-change)' \
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-f $(word 3,$^); \
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) > $@T
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mv -f $@T $@
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) > $(common-objpfx)sysd-versionsT
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mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
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touch $@
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endif # avoid-generated
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endif # $(build-shared) = yes
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endif # sysd-sorted-done
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@ -101,6 +101,10 @@ END {
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oldlib = "";
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oldver = "";
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real_first_ver_header = buildroot "first-versions.h"
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first_ver_header = real_first_ver_header "T"
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printf("#ifndef _FIRST_VERSIONS_H\n") > first_ver_header;
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printf("#define _FIRST_VERSIONS_H\n") > first_ver_header;
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printf("version-maps =");
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while (getline < tmpfile) {
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if ($1 != oldlib) {
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@ -127,11 +131,24 @@ END {
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printf(" ") > outfile;
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for (n = 3; n <= NF; ++n) {
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printf(" %s", $n) > outfile;
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sym = $n;
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sub(";", "", sym);
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first_ver_macro = "FIRST_VERSION_" oldlib "_" sym;
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if (!(first_ver_macro in first_ver_seen) \
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&& oldver ~ "^GLIBC_[0-9]" \
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&& sym ~ "^[A-Za-z0-9_]*$") {
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ver_val = oldver;
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gsub("\\.", "_", ver_val);
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printf("#define %s %s\n", first_ver_macro, ver_val) > first_ver_header;
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first_ver_seen[first_ver_macro] = 1;
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}
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}
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printf("\n") > outfile;
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}
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printf("\n");
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printf("#endif /* first-versions.h */\n") > first_ver_header;
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closeversion(oldver, veryoldver);
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close_and_move(outfile, real_outfile);
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close_and_move(first_ver_header, real_first_ver_header);
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#system("rm -f " tmpfile);
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}
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@ -19,48 +19,19 @@
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#ifndef _MATH_TYPE_MACROS_DOUBLE
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#include <math_ldbl_opt.h>
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#define LDOUBLE_cabsl_libm_version GLIBC_2_1
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#define LDOUBLE_cargl_libm_version GLIBC_2_1
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#define LDOUBLE_cimagl_libm_version GLIBC_2_1
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#define LDOUBLE_conjl_libm_version GLIBC_2_1
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#define LDOUBLE_creall_libm_version GLIBC_2_1
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#define LDOUBLE_cacosl_libm_version GLIBC_2_1
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#define LDOUBLE_cacoshl_libm_version GLIBC_2_1
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#define LDOUBLE_ccosl_libm_version GLIBC_2_1
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#define LDOUBLE_ccoshl_libm_version GLIBC_2_1
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#define LDOUBLE_casinl_libm_version GLIBC_2_1
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#define LDOUBLE_csinl_libm_version GLIBC_2_1
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#define LDOUBLE_casinhl_libm_version GLIBC_2_1
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#define LDOUBLE_csinhl_libm_version GLIBC_2_1
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#define LDOUBLE_catanl_libm_version GLIBC_2_1
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#define LDOUBLE_catanhl_libm_version GLIBC_2_1
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#define LDOUBLE_ctanl_libm_version GLIBC_2_1
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#define LDOUBLE_ctanhl_libm_version GLIBC_2_1
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#define LDOUBLE_cexpl_libm_version GLIBC_2_1
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#define LDOUBLE_clogl_libm_version GLIBC_2_1
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#define LDOUBLE_cprojl_libm_version GLIBC_2_1
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#define LDOUBLE_csqrtl_libm_version GLIBC_2_1
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#define LDOUBLE_cpowl_libm_version GLIBC_2_1
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#define LDOUBLE_clog10l_libm_version GLIBC_2_1
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#define LDOUBLE___clog10l_libm_version GLIBC_2_1
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#define LDOUBLE_fdiml_libm_version GLIBC_2_1
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#define LDOUBLE_fmaxl_libm_version GLIBC_2_1
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#define LDOUBLE_fminl_libm_version GLIBC_2_1
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#define LDOUBLE_ilogbl_libm_version GLIBC_2_0
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#define LDOUBLE_nanl_libm_version GLIBC_2_1
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#include <first-versions.h>
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/* Define compat symbols for long double on platforms
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where it was not always a distinct type. */
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#if !defined M_LIBM_NEED_COMPAT
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# define M_LIBM_NEED_COMPAT(f) \
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LONG_DOUBLE_COMPAT (libm, LDOUBLE_ ## f ## l_libm_version)
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LONG_DOUBLE_COMPAT (libm, FIRST_VERSION_libm_ ## f ## l)
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#endif
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#if !defined declare_mgen_libm_compat
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# define declare_mgen_libm_compat(from, to) \
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compat_symbol (libm, from, to ## l, \
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LDOUBLE_ ## to ## l_libm_version);
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FIRST_VERSION_libm_ ## to ## l);
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#endif
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#include_next <math-type-macros-double.h>
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