<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/84547>84547</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            18.1.0 (on linux): cross building for 32 bit on 64 bit host fails
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          balducci
      </td>
    </tr>
</table>

<pre>
    hi

cross building for 32 bit on 64 bit linux host stops with:

```
/usr/bin/clang++  -m32 -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/build.d/tools/bolt/lib/Core -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/bolt/lib/Core -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/build.d/include -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/llvm/include -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/bolt/include -I/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/build.d/tools/bolt/include -fPIC -fno-semantic-interposition   -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC -fno-exceptions -funwind-tables -MD -MT tools/bolt/lib/Core/CMakeFiles/LLVMBOLTCore.dir/BinaryFunction.cpp.o -MF tools/bolt/lib/Core/CMakeFiles/LLVMBOLTCore.dir/BinaryFunction.cpp.o.d -o tools/bolt/lib/Core/CMakeFiles/LLVMBOLTCore.dir/BinaryFunction.cpp.o -c /home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/bolt/lib/Core/BinaryFunction.cpp
/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/bolt/lib/Core/BinaryFunction.cpp:190:7: error: static assertion failed due to requirement 'sizeof(const char *) >= sizeof(llvm::bolt::DebugLineTableRowRef)': Cannot fit instruction debug line information into SMLoc's pointer
  190 | sizeof(decltype(SMLoc().getPointer())) >= sizeof(DebugLineTableRowRef),
 | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/balducci/tmp/install-us-d/llvm-18.1.0.d/llvm-18.1.0/bolt/lib/Core/BinaryFunction.cpp:190:46: note: expression evaluates to '4 >= 8'
  190 | sizeof(decltype(SMLoc().getPointer())) >= sizeof(DebugLineTableRowRef),
 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
```

Building for the native 64 bit host completes successfully.

I have been cross building for 32 bit with versions <=17.0.6 since
ever without any problem.

This is my configuration for cross building (unchanged from last
successful run with 17.0.6):

```
-DCMAKE_BUILD_TYPE=
-DCMAKE_INSTALL_PREFIX=/opt/stow.d/versions/llvm-18.1.0/usr
-DLLVM_ENABLE_FFI=ON
-DFFI_INCLUDE_DIR=/usr/include 
-DFFI_STATIC_LIBRARIES=""
-DLLVM_BUILD_32_BITS=ON
-DLLVM_TARGET_ARCH=x86
-DLLVM_DEFAULT_TARGET_TRIPLE=i386-pc-linux-gnu
-DLLVM_HOST_TRIPLE=i386-pc-linux-gnu
-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=i386-pc-linux-gnu
-DCMAKE_ASM_FLAGS=-m32
-DCMAKE_VERBOSE_MAKEFILE=ON
-DLLVM_ENABLE_PROJECTS=""
-DLLVM_BUILD_LLVM_DYLIB=ON
-DLLVM_INSTALL_UTILS=ON
-DLLVM_TARGETS_TO_BUILD="X86;AMDGPU;BPF;"
-DLLVM_ENABLE_RTTI=ON
-DLLVM_INCLUDE_BENCHMARKS=OFF
-DLLDB_PYTHON_EXE_RELATIVE_PATH=/usr/python3/bin/python
```

I am building with:

```
##> clang --version
clang version 17.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
```


Do I need any new cmake option?

thanks in advance for any help
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzEWN1zm7oS_2uUF408Njj-ePADNtByD449NmnaJ0aGBXQrJI4k8nEe7t9-R8Kpk7bp7Z1pz8kwxNKufvuh1WoXqjWrBcAKXa_RdXhFe9NItTpRXvZFwa5OsnxaNQyNQzQOhnehpNb41DNeMlHjSirse_jEDJYCz6buF2eif8SN1AZrIzuNH5hpkB-8xEGz8fkZhl7ca4W8-MQE8uKCU1Ejb428Ncak9T1MwjxO0ijfxfExyvJ1kh2RH86mlvDu5jY_7m4Pm8iO0uDwLnK8l7n8mIWbfLO7OWbBTZZvg81hd7wQ4t1hG3w7nSbb5DKbIC9uZAtWybODkBebtkNezIQ2lHPSa1IiL-b8viWTxWgyGo--GtvV1nlu3kjJtZ2R3Fg2dkJevJEKfqW034n9xRImCt6XvxLbjn4L8NkhvwH4rX39IqraJxtMKiGJhpYKwwrChAHVSc0MkwJjTO5AKamQH5bUADGshRdzvah7qkooCb2njNMT48w8EQEPmNxRzi3ro1EUkzshSS96DSXpqKItGFCY3D0oZoBoo5ioNSZ3BdWG_NlTu7JlWjNRk4oBLwkTzDDK2V-gNCYdlE7fAZhLUbuXRRiO6XJBCtl21BCngDWQYXLH2o6zghlSUc5No2RfN3aRvAcFJdEPzBQNKaGiPTcDuJDwWEBniHnqwE0Jcs-U6SknpZHWihI4GCDfoei-rkEbYvEVsz6_G4wlhRT3oLT1sjOVA7UZjDBRgjDUDITC0JK09OkEpBe67zqpDJSYVCWjtZDasEKTQnIrrKp6Udh1RIP7ry0fNfTFeOdjEt6E0fr2HSbalMgPzw6bzF_Gw2DyGaMXD0yUxNATB43JNsRkm-E3k4X9t6WfIWYcLEOaftiud2lmaaOS2ay6ZoKqp_is76joupHEZBv_ctBRiYn8DaoW-Lflw-_K_HIr_Z0y_WCyHCM_mCM_wOcjH2Btg7PAVGtQLkoryjiUuOwBG4kV_NkzBS0Ig5E31-wvkBXyFoUU2uCioQojL0DeEiM_Qn6Iv3C4DOsHyA-cfu5XCKe-TpmAzAbfQT4coELeEnlOpw0VQhpcMYOt_ap3uuPSLrK3PmAmKqna4TQxYSQ-blNZWL1wJ12uGzyL8WQ5xmi-uahTQsHtkUfe4rxogbzlqAazP690E8PzjTFvKr45C7Sy0HX0n1_x949Gx3Rmt0JIAy5MHjsF2qU1uKe8pwa0DQvkzafPTlrY7fsH3f6zXv1fuzNAToajgWsQoKiBcvT9itK91y8LVdMAFtSwe3iuVF2Nau8te59orPuiAK2rnvOn0UuYBDf0HvAJQOC3K2Bb5uLzJaMx8jfIDyfz0Xg0w5qJAgYsuAflWGVvMBVPuFPyxKF9JTBrmMZM4_YJF1JUrO7VcKisuK80QN6iF0VDRQ0lrpRsMafaDDgXi7DqxaDhoJLdpR-W5CTcbIM_onx9m6Rhnn3a251_TUpsPZ2m-f4QxclHS_Zi2dlg1kY-uFB_dsc3UW_L_TOYvQXy6CZYp1Eexwnyw93NMy2Okzy52aS3YZSHyWGQMbQKz2XVS9ZjFmSJrdzXh-CQREfH79nnpazBJN97biMu4hw5sx1ElgeHzXvkh4-L2StqGMXBbZo9c2WHZJ9a1zB_MSNdQVz3Q2rRv1r1fnf8Gd7NbrtP0uiQH7L_X9CwKcFxm8dp8M4aZlun19QP0WG9O0a5Hdgm6VvrzxuxP-z-FW2yH3pw8MenNFl_C_McG7dZkr7p42Oe7QasQczHxQz562AbvtvfIn-93sfIX38t-6zgIcuS74kdYmUd3Wzeb4PDH052HF-YwnW-_5S9393k0ccoP0RpkCUfonwfZO9fRlf3ZBop_C8t6TD-QapJMG0vh_JnWl7fPn6EXbeLCTmflXOj7SafS9bzmR1yA1U12PsaPy5m-Wz6nVjIGgW0xK0sgVtG22A8ntUcriYoQ-bKi1ed99vWDe9Q4gQLgNIlLtt2FC39DFi62hX58Utm01DxWWMmMC3vqSjAJS-7sAHeXZUrv1z6S3oFq8l8vFx6M395fdWspv6ymI2X09NkWc3LaVHN_fHp-lRNp8VyUnrXV2zljb3p2B8vJkvfn1yPiuncW1QAS1gs5t50hqZjaCnjI5txRlLVV0zrHlaL6fV0fsXpCbh2nzw8z5rgiDbIrsMrtXJZ6tTXGk3HnGmjLyiGGQ6rIYPZrCvF8KljSKU_uBgun0bchWMLOH3VK75qjOm0DRMvRl5cM9P0p1Eh20v_69TplPw3FK6VtLraZOps-W8AAAD__8e9lyg">