Changes between Version 24 and Version 26 of Ticket #29152


Ignore:
Timestamp:
Sep 13, 2020, 1:43:44 AM (2 years ago)
Author:
mjo
Comment:

The -no-undefined is only needed when building a shared library, so the flag can be appended in e.g. 

libfoo_la_LDFLAGS = -no-undefined

rather than the global 

AM_LDFLAGS=-no-undefined

that will affect all link operations (including executables). It probably doesn't hurt much, but I remember vaguely that --as-needed was nicer than --no-undefined if you were going to apply it globally.

I also think most projects should have LT_INIT([disable-static]) in configure.ac these days, to disable the static libraries by default. They can still be enabled with --enable-static, but for most people they're a waste of time/space.

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  • Ticket #29152 – Description

    v24 v26  
    1313}}}
    1414
    15 In `singular`, only the `gitfan.la` library (module) is affected:
    16 {{{
    17 Making all in gitfan
    18 ...
    19 /usr/bin/bash ../../../libtool  --tag=CXX   --mode=link g++ -std=gnu++11  -O2 -g  -pipe -fno-common -g0 -O3 -Wno-unused-function -Wno-trigraphs -Wno-unused-parameter -Wunknown-pragmas -Wno-unused-variable -fomit-frame-pointer -fwrapv -fvisibility=default -finline-functions -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -fconserve-space -funroll-loops -fno-delete-null-pointer-checks -fno-rtti -module -export-dynamic -avoid-version -flat_namespace -weak_reference_mismatches weak -undefined dynamic_lookup -L/cygdrive/d/a/sage/sage/local/lib -Wl,-rpath,/cygdrive/d/a/sage/sage/local/lib  -pipe -fno-common -g0 -O3 -Wno-unused-function -Wno-trigraphs -Wno-unused-parameter -Wunknown-pragmas -Wno-unused-variable -fomit-frame-pointer -fwrapv -fvisibility=default -finline-functions -fno-exceptions -fconserve-space -funroll-loops -fno-delete-null-pointer-checks  -Wl,-Bdynamic -o gitfan.la -rpath /cygdrive/d/a/sage/sage/local/libexec/singular/MOD gitfan_la-gitfan.lo  -lreadline -lncurses -lmpfr -lrt
    20 libtool: warning: undefined symbols not allowed in x86_64-unknown-cygwin shared libraries; building static only
    21 libtool: link: ar cru .libs/gitfan.a  gitfan_la-gitfan.o
    22 libtool: link: ranlib .libs/gitfan.a
    23 libtool: link: ( cd ".libs" && rm -f "gitfan.la" && ln -s "../gitfan.la" "gitfan.la" )
    24 }}}
    25 
    26 
    27 The issue also affects the optional package `meataxe`.
     15It also affects the optional package `meataxe`.
    2816{{{
    2917[meataxe-1.0.p0] /usr/bin/bash ../libtool  --tag=CC   --mode=link gcc  -g -O2  -L/opt/sagemath-9.0/local/lib -Wl,-rpath,/opt/sagemath-9.0/local/lib  -o libmtx.la -rpath /opt/sagemath-9.0/local/lib args.lo berlekmp.lo bsand.lo bscore.lo bsdup.lo bsissub.lo bsmatch.lo bsminus.lo bsop.lo bsor.lo bsprint.lo bsread.lo bswrite.lo cfinfo.lo charpol.lo chbasis.lo error.lo ffio.lo fpcore.lo fpdup.lo fpmul.lo fpmul2.lo fpprint.lo gcd.lo genseed.lo grmaprow.lo grmatcore.lo grtable.lo homcomp.lo imatcore.lo imatread.lo imatwrite.lo init.lo intio.lo issub.lo isisom.lo kernel-0.lo ldiag.lo maddmul.lo mat2vec.lo matadd.lo matclean.lo matcmp.lo maketabF.lo matcopy.lo matcore.lo matcut.lo matdup.lo matech.lo matid.lo matins.lo matinv.lo matmul.lo matnull.lo matorder.lo matpivot.lo matprint.lo matpwr.lo matread.lo mattr.lo mattrace.lo matwrite.lo message.lo mfcore.lo mfread.lo mfreadlong.lo mfwrite.lo mfwritelong.lo minpol.lo mkendo.lo mmulscal.lo mraddgen.lo mrcore.lo mrread.lo mrtranspose.lo mrwrite.lo msclean.lo mscore.lo mtensor.lo mtxobj.lo os.lo permcmp.lo permcore.lo permdup.lo perminv.lo permmul.lo permorder.lo permprint.lo permpwr.lo permread.lo permwrite.lo poladd.lo polcmp.lo polcore.lo polderive.lo poldiv.lo poldup.lo polgcd.lo polmul.lo polprint.lo polread.lo polwrite.lo quotient.lo random.lo rdcfgen.lo saction.lo setcore.lo setinsert.lo settest.lo spinup.lo spinup2.lo split.lo stabpwr.lo stfcore.lo stfread.lo stfwrite.lo string.lo sumint.lo temap.lo tkinfo.lo vec2mat.lo wgen.lo window.lo zcleanrow.lo zcmprow.lo zgap.lo zpermrow.lo zzz2.lo