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build: remove glibc-back-compat from build system

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At this point, or minimum required glibc is implicitly 2.18, due to
thread_local support being enabled by default. However, users can
disable thread_local support to maintain 2.17 ccompat for now, which is
currently done in the Guix build.
This commit is contained in:
fanquake 2021-09-09 13:27:47 +08:00
parent 2ef0accefc
commit 62e45da945
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GPG Key ID: 2EEB9F5CC09526C1
2 changed files with 4 additions and 31 deletions
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24
configure.ac
View File

@ -240,15 +240,9 @@ AC_ARG_ENABLE([lcov-branch-coverage],
[use_lcov_branch=yes],
[use_lcov_branch=no])
AC_ARG_ENABLE([glibc-back-compat],
[AS_HELP_STRING([--enable-glibc-back-compat],
[enable backwards compatibility with glibc])],
[use_glibc_compat=$enableval],
[use_glibc_compat=no])
AC_ARG_ENABLE([threadlocal],
[AS_HELP_STRING([--enable-threadlocal],
[enable features that depend on the c++ thread_local keyword (currently just thread names in debug logs). (default is to enabled if there is platform support and glibc-back-compat is not enabled)])],
[enable features that depend on the c++ thread_local keyword (currently just thread names in debug logs). (default is to enable if there is platform support)])],
[use_thread_local=$enableval],
[use_thread_local=auto])
@ -863,17 +857,7 @@ if test x$ac_cv_sys_large_files != x &&
CPPFLAGS="$CPPFLAGS -D_LARGE_FILES=$ac_cv_sys_large_files"
fi
if test x$use_glibc_compat != xno; then
AX_CHECK_LINK_FLAG([[-Wl,--wrap=__divmoddi4]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=__divmoddi4"])
AX_CHECK_LINK_FLAG([[-Wl,--wrap=log2f]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=log2f"])
case $host in
powerpc64* | ppc64*)
AX_CHECK_LINK_FLAG([[-Wl,--no-tls-get-addr-optimize]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--no-tls-get-addr-optimize"])
;;
esac
else
AC_SEARCH_LIBS([clock_gettime],[rt])
fi
AC_SEARCH_LIBS([clock_gettime],[rt])
if test "x$enable_gprof" = xyes; then
dnl -pg is incompatible with -pie. Since hardening and profiling together doesn't make sense,
@ -1065,7 +1049,7 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([
dnl thread_local is currently disabled when building with glibc back compat.
dnl Our minimum supported glibc is 2.17, however support for thread_local
dnl did not arrive in glibc until 2.18.
if test "x$use_thread_local" = xyes || { test "x$use_thread_local" = xauto && test "x$use_glibc_compat" = xno; }; then
if test "x$use_thread_local" = xyes || test "x$use_thread_local" = xauto; then
TEMP_LDFLAGS="$LDFLAGS"
LDFLAGS="$TEMP_LDFLAGS $PTHREAD_CFLAGS"
AC_MSG_CHECKING([for thread_local support])
@ -1806,7 +1790,6 @@ AM_CONDITIONAL([ENABLE_BENCH],[test x$use_bench = xyes])
AM_CONDITIONAL([USE_QRCODE], [test x$use_qr = xyes])
AM_CONDITIONAL([USE_LCOV],[test x$use_lcov = xyes])
AM_CONDITIONAL([USE_LIBEVENT],[test x$use_libevent = xyes])
AM_CONDITIONAL([GLIBC_BACK_COMPAT],[test x$use_glibc_compat = xyes])
AM_CONDITIONAL([HARDEN],[test x$use_hardening = xyes])
AM_CONDITIONAL([ENABLE_SSE42],[test x$enable_sse42 = xyes])
AM_CONDITIONAL([ENABLE_SSE41],[test x$enable_sse41 = xyes])
@ -1849,7 +1832,6 @@ AC_SUBST(DEBUG_CPPFLAGS)
AC_SUBST(WARN_CXXFLAGS)
AC_SUBST(NOWARN_CXXFLAGS)
AC_SUBST(DEBUG_CXXFLAGS)
AC_SUBST(COMPAT_LDFLAGS)
AC_SUBST(ERROR_CXXFLAGS)
AC_SUBST(GPROF_CXXFLAGS)
AC_SUBST(GPROF_LDFLAGS)

11
src/Makefile.am
View File

@ -571,7 +571,7 @@ libbitcoin_common_a_SOURCES = \
# util: shared between all executables.
# This library *must* be included to make sure that the glibc
# backward-compatibility objects and their sanity checks are linked.
# sanity checks are linked.
libbitcoin_util_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
libbitcoin_util_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
libbitcoin_util_a_SOURCES = \
@ -619,11 +619,6 @@ if USE_LIBEVENT
libbitcoin_util_a_SOURCES += util/url.cpp
endif
if GLIBC_BACK_COMPAT
libbitcoin_util_a_SOURCES += compat/glibc_compat.cpp
AM_LDFLAGS += $(COMPAT_LDFLAGS)
endif
# cli: shared between bitcoin-cli and bitcoin-qt
libbitcoin_cli_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
libbitcoin_cli_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
@ -751,10 +746,6 @@ if BUILD_BITCOIN_LIBS
include_HEADERS = script/bitcoinconsensus.h
libbitcoinconsensus_la_SOURCES = support/cleanse.cpp $(crypto_libbitcoin_crypto_base_a_SOURCES) $(libbitcoin_consensus_a_SOURCES)
if GLIBC_BACK_COMPAT
libbitcoinconsensus_la_SOURCES += compat/glibc_compat.cpp
endif
libbitcoinconsensus_la_LDFLAGS = $(AM_LDFLAGS) -no-undefined $(RELDFLAGS)
libbitcoinconsensus_la_LIBADD = $(LIBSECP256K1)
libbitcoinconsensus_la_CPPFLAGS = $(AM_CPPFLAGS) -I$(builddir)/obj -I$(srcdir)/secp256k1/include -DBUILD_BITCOIN_INTERNAL