[Bug binutils/29435] New: Building openblas with binutils 2.38 leads to "ELF load command address/offset not properly aligned"

[fxcoudert at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29435

            Bug ID: 29435
           Summary: Building openblas with binutils 2.38 leads to "ELF
                    load command address/offset not properly aligned"
           Product: binutils
           Version: 2.38
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: fxcoudert at gcc dot gnu.org
  Target Milestone: ---

This is an issue we originally saw during Homebrew CI on Linux:
https://github.com/Homebrew/homebrew-core/pull/106978

We've narrowed it down to a binutils issues, and openblas maintainers seem to
think the same: https://github.com/xianyi/OpenBLAS/issues/3708

Using the same setup, we see the build succeed and produce a working shared
library with binutils 2.37, but produce an invalid library with binutils 2.38.

We configure openblas with DYNAMIC_ARCH=1 USE_OPENMP=1 NUM_THREADS=56
TARGET=CORE2
Compiling and linking a small test program against the library build with
binutils 2.38 gives:

./test: error while loading shared libraries: libopenblas.so.0: ELF load
command address/offset not properly aligned


The library is originally produced by this compilation command:

gcc -O2 -DSMALL_MATRIX_OPT -DMAX_STACK_ALLOC=2048 -fopenmp -Wall -m64
-DF_INTERFACE_GFORT -fPIC -DDYNAMIC_ARCH -DSMP_SERVER -DUSE_OPENMP -DNO_WARMUP
-DMAX_CPU_NUMBER=56 -DMAX_PARALLEL_NUMBER=1 -DBUILD_SINGLE=1 -DBUILD_DOUBLE=1
-DBUILD_COMPLEX=1 -DBUILD_COMPLEX16=1 -DVERSION=\"0.3.20\" -UASMNAME -UASMFNAME
-UNAME -UCNAME -UCHAR_NAME -UCHAR_CNAME -DASMNAME= -DASMFNAME=_ -DNAME=_
-DCNAME= -DCHAR_NAME=\"_\" -DCHAR_CNAME=\"\" -DNO_AFFINITY -I..  -shared -o
../libopenblasp-r0.3.20.so \
-Wl,--whole-archive ../libopenblasp-r0.3.20.a -Wl,--no-whole-archive \
-Wl,-soname,libopenblas.so.0 -lm -lpthread -lgfortran -lm -lpthread -lgfortran

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