Hi all,

I found a problem when trying to build QEMU with igvm enabled:
When igvm is not installed in a "canonical" path, the build system
cannot find the library.

To reproduce:

build igvm (latest upstream, as there were some problems with pkg-config).
PREFIX=$HOME/igvminst make -f igvm_c/Makefile install

This would result in igvm being installed in $HOME/igvminst

Then build QEMU
PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:$HOME/igvminst/lib64/pkgconfig/"
./configure --target-list=x86_64-softmmu --enable-igvm

ninja -C build

This fails with the following error:

In file included from ../stubs/igvm.c:15:
/root/qemu/include/system/igvm-internal.h:19:10: fatal error:
igvm/igvm.h: No such file or directory
   19 | #include <igvm/igvm.h>
      |          ^~~~~~~~~~~~~

IIUC the problem is that the stubs/igvm.c file uses the igvm header
via the "igvm-internal.h", but the library is not added as a
dependency in the meson config file.

I tried this change to meson, but it doesn't seem to work.

Not sure how to fix this.

Thanks,
Luigi

index 6ae478b..5ac4ae9 100644
--- a/stubs/meson.build
+++ b/stubs/meson.build
@@ -72,7 +72,8 @@ if have_system
   stub_ss.add(files('cmos.c'))
   stub_ss.add(files('fw_cfg.c'))
   if igvm.found()
-    stub_ss.add(files('igvm.c'))
+    stub_ss.add(igvm)
+    stub_ss.add(files('igvm.c'), igvm)
   endif
   stub_ss.add(files('kvm.c'))
   stub_ss.add(files('target-get-monitor-def.c'))
diff --git a/target/i386/meson.build b/target/i386/meson.build
index d385eaf..b20e2d6 100644
--- a/target/i386/meson.build
+++ b/target/i386/meson.build
@@ -27,7 +27,8 @@ i386_system_ss.add(files(
 i386_system_ss.add(when: 'CONFIG_SEV', if_true: files('sev.c'),
                                        if_false: files('sev-system-stub.c'))
 if igvm.found()
-  i386_system_ss.add(files('igvm.c'))
+  i386_system_ss.add(igvm)
+  i386_system_ss.add(files('igvm.c'), igvm)
 endif

 i386_user_ss = ss.source_set()

On Tue, 3 Mar 2026 at 11:27, Luigi Leonardi <leonardi@redhat.com> wrote:
>
> Hi all,
>
> I found a problem when trying to build QEMU with igvm enabled:
> When igvm is not installed in a "canonical" path, the build system
> cannot find the library.
>
> To reproduce:
>
> build igvm (latest upstream, as there were some problems with pkg-config).
> PREFIX=$HOME/igvminst make -f igvm_c/Makefile install
>
> This would result in igvm being installed in $HOME/igvminst
>
> Then build QEMU
> PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:$HOME/igvminst/lib64/pkgconfig/"
> ./configure --target-list=x86_64-softmmu --enable-igvm
>
> ninja -C build
>
> This fails with the following error:
>
> In file included from ../stubs/igvm.c:15:
> /root/qemu/include/system/igvm-internal.h:19:10: fatal error:
> igvm/igvm.h: No such file or directory
>    19 | #include <igvm/igvm.h>
>       |          ^~~~~~~~~~~~~
>
> IIUC the problem is that the stubs/igvm.c file uses the igvm header
> via the "igvm-internal.h", but the library is not added as a
> dependency in the meson config file.
>
> I tried this change to meson, but it doesn't seem to work.
>
> Not sure how to fix this.
>
> Thanks,
> Luigi
>

I found a possible solution:
stubs/igvm.c doesn't really require the igvm library. It just needs
the `QIgvm` structure.
Therefore we can just use a forward declaration.

I will soon send a patch.

Luigi