Comments (7)
giordano
commented on September 7, 2024
@NickCao would you be able to give #55624 a try?
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giordano
commented on September 7, 2024
LDFLAGSis required for the linker to find bundled libraries
Line 728 in 378f192
Why do you claim setting LDFLAGS is necessary? Autotools should be able to find libraries in the prefix, no? That's what we do with BinaryBuilder (which also uses a non-standard prefix where to install the packages) and we never have to set LDFLAGS separately to point the linker to the prefix. And we already set the prefix in
Line 7 in 378f192
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NickCao
commented on September 7, 2024
Why do you claim setting
LDFLAGSis necessary? Autotools should be able to find libraries in the prefix, no?
I believe the --prefix option is only about the installation prefix of the package currently being configured (libunwind)? It's not passed to the underlying compiler/linker by autotools, so the linker would still follow its default search paths.
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giordano
commented on September 7, 2024
I'm not sure: in BinaryBuilder we don't have the prefix's libdir (/workspace/destdir/lib) anywhere in the default search path of the compiler (see LIBRARY_PATH):
sandbox:${WORKSPACE} # SUPER_VERBOSE=1 gcc -v
/opt/x86_64-linux-gnu/bin/x86_64-linux-gnu-gcc -D_GLIBCXX_USE_CXX11_ABI=1 -frandom-seed=0x75262c83 -L/opt/x86_64-linux-gnu/x86_64-linux-gnu/lib64 -Wl,-rpath-link,/opt/x86_64-linux-gnu/x86_64-linux-gnu/lib64 -march=x86-64 -mtune=generic -v
Using built-in specs.
COLLECT_GCC=/opt/x86_64-linux-gnu/bin/x86_64-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/opt/x86_64-linux-gnu/bin/../libexec/gcc/x86_64-linux-gnu/5.2.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: /workspace/srcdir/gcc-5.2.0/configure --prefix=/workspace/destdir --target=x86_64-linux-gnu --host=x86_64-linux-musl --build=x86_64-linux-musl --disable-multilib --disable-werror --enable-shared --enable-host-shared --enable-threads=posix --with-sysroot=/workspace/destdir/x86_64-linux-gnu/sys-root --program-prefix=x86_64-linux-gnu- --disable-bootstrap --with-arch=x86-64 --enable-languages=c,c++,fortran,objc,obj-c++
Thread model: posix
gcc version 5.2.0 (GCC)
COMPILER_PATH=/opt/x86_64-linux-gnu/bin/../libexec/gcc/x86_64-linux-gnu/5.2.0/:/opt/x86_64-linux-gnu/bin/../libexec/gcc/:/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/../../../../x86_64-linux-gnu/bin/
LIBRARY_PATH=/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/:/opt/x86_64-linux-gnu/bin/../lib/gcc/:/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/../../../../x86_64-linux-gnu/lib/../lib64/:/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/lib/../lib64/:/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64/:/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/../../../../x86_64-linux-gnu/lib/:/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/lib/:/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/
COLLECT_GCC_OPTIONS='-D' '_GLIBCXX_USE_CXX11_ABI=1' '-frandom-seed=0x75262c83' '-L/opt/x86_64-linux-gnu/x86_64-linux-gnu/lib64' '-march=x86-64' '-mtune=generic' '-v'
/opt/x86_64-linux-gnu/bin/../libexec/gcc/x86_64-linux-gnu/5.2.0/collect2 -plugin /opt/x86_64-linux-gnu/bin/../libexec/gcc/x86_64-linux-gnu/5.2.0/liblto_plugin.so -plugin-opt=/opt/x86_64-linux-gnu/bin/../libexec/gcc/x86_64-linux-gnu/5.2.0/lto-wrapper -plugin-opt=-fresolution=/tmp/cchfGdiM.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 /opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64/crt1.o /opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64/crti.o /opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/crtbegin.o -L/opt/x86_64-linux-gnu/x86_64-linux-gnu/lib64 -L/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0 -L/opt/x86_64-linux-gnu/bin/../lib/gcc -L/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/../../../../x86_64-linux-gnu/lib/../lib64 -L/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/lib/../lib64 -L/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64 -L/opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/../../../../x86_64-linux-gnu/lib -L/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/lib -L/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib -rpath-link /opt/x86_64-linux-gnu/x86_64-linux-gnu/lib64 -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /opt/x86_64-linux-gnu/bin/../lib/gcc/x86_64-linux-gnu/5.2.0/crtend.o /opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64/crtn.o
/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/lib/../lib64/crt1.o: In function `_start':
/workspace/srcdir/glibc-2.17/csu/../sysdeps/x86_64/start.S:119: undefined reference to `main'
collect2: error: ld returned 1 exit statusand yet we can find all the dependencies of libunwind just by setting the prefix (which I believe is used to look for the dependencies as well): https://github.com/JuliaPackaging/Yggdrasil/blob/84c1061962644addde53ef51f2ada406be61978b/L/LibUnwind/LibUnwind%401.8.1/build_tarballs.jl. LDFLAGS isn't set anywhere
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NickCao
commented on September 7, 2024
That's since libunwind mostly only depends on zlib, which is available on nearly every system.
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giordano
commented on September 7, 2024
That's since libunwind mostly only depends on zlib, which is available on nearly every system.
Not in the binarybuilder environment (which is why I'm insisting on taking it as an example).
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NickCao
commented on September 7, 2024
That's since libunwind mostly only depends on zlib, which is available on nearly every system.
Not in the binarybuilder environment (which is why I'm insisting on taking it as an example).
Except there is, tested with:
--- a/L/LibUnwind/[email protected]/build_tarballs.jl
+++ b/L/LibUnwind/[email protected]/build_tarballs.jl
@@ -29,6 +29,14 @@ if [[ ${bb_full_target} == *-sanitize+memory* ]]; then
cp -rL ${libdir}/linux/* /opt/x86_64-linux-musl/lib/clang/*/lib/linux/
fi
+cat > test.c <<EOF
+int main() {}
+EOF
+
+$CC -Wl,--verbose test.c -lz
+
+exit 1
+
export CFLAGS="-DPI -fPIC"
./configure \
--prefix=${prefix} \attempt to open /opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/local/lib/libz.so succeeded
-lz (/opt/x86_64-linux-gnu/bin/../x86_64-linux-gnu/sys-root/usr/local/lib/libz.so
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