Re: On non-Windows, hard depend on uselocale(3)

On 2026-Feb-04, Peter Eisentraut wrote:

> > It corresponds to this stale CF entry,
> > https://commitfest.postgresql.org/patch/5166/
> 
> My recollection is that I didn't at the time find any common pattern among
> the failing buildfarm members.  So the only way to move forward here would
> be to commit it again and then debug it live via the buildfarm.

Did you try adding $(PTHREAD_CFLAGS) or $(PTHREAD_LIBS) to the compile
line for test_json_parser?

I see that the failure in jackdaw (snapshot 2025-03-28 15:30:44)
was

ccache gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security
-fno-strict-aliasing-fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -O2 -I. -I.
-I../../../../src/include  -D_GNU_SOURCE -I/usr/include/libxml2   -c -o test_json_parser_incremental.o
test_json_parser_incremental.c
ccache gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security
-fno-strict-aliasing-fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -O2
test_json_parser_incremental.o -L../../../../src/port -L../../../../src/common   -Wl,--as-needed
-Wl,-rpath,'/home/debian/17-jackdaw/buildroot/HEAD/inst/lib',--enable-new-dtags  -lpgcommon -lpgport -lxslt -lxml2
-lssl-lcrypto -lgssapi_krb5 -lz -lreadline -lpthread -lrt -ldl -lm  -o test_json_parser_incremental
 
ccache gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security
-fno-strict-aliasing-fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -O2
test_json_parser_incremental.o-L../../../../src/port -L../../../../src/common   -Wl,--as-needed
-Wl,-rpath,'/home/debian/17-jackdaw/buildroot/HEAD/inst/lib',--enable-new-dtags-lpgcommon_excluded_shlib
-L../../../../src/common-lpgcommon_shlib -L../../../../src/port -lpgport_shlib -L../../../../src/interfaces/libpq -lpq
-otest_json_parser_incremental_shlib
 
/usr/bin/ld: ../../../../src/port/libpgport_shlib.a(locale_shlib.o): undefined reference to symbol
'pthread_once@@GLIBC_2.17'
/usr/bin/ld: /lib/aarch64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:30: test_json_parser_incremental_shlib] Error 1


But if you look at how jackdaw compiles, say, ecpglib, there's

ccache gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security
-fno-strict-aliasing-fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -O2 -pthread
-D_REENTRANT-D_THREAD_SAFE -I../include -I../../../../src/interfaces/ecpg/include -I. -I.
-I../../../../src/interfaces/ecpg/ecpglib-I../../../../src/interfaces/libpq -I../../../../src/include -D_GNU_SOURCE
-I/usr/include/libxml2    -c -o keywords.o keywords.c
 

note that it has "-pthread", which is not present in the
test_json_parser compile/link.  Does this matter because
libpgport_shlib.a needs that?  Did maybe test_json_parser not previously
need this locale thingy?

I suspect this is a problem in test_json_parser that somehow got tickled
by your patch, not a problem in your patch.

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
¡Ay, ay, ay!  Con lo mucho que yo lo quería (bis)
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¡Ay Camarón! ¡Ay Camarón!                                (Paco de Lucía)