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+id = 2510
+title = "Cross compiling tools / qemu-img results in \"ninja: no work to do\""
+state = "closed"
+created_at = "2024-08-17T09:13:19.318Z"
+closed_at = "2024-08-19T05:56:22.707Z"
+labels = []
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2510"
+host-os = "Fedora 40 (build container, in Docker)"
+host-arch = "n/a"
+qemu-version = "ecdfa31beb1f7616091bedba79dfdf9ee525ed9d"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """I have the following Dockerfile setting up a cross-compile environment for QEMU.
+I am trying to build qemu-img.exe only at the moment
+
+
+```
+FROM fedora as builder
+RUN --mount=type=cache,target=/var/cache \\
+        dnf -v install --assumeyes strace gcc make mingw64-gcc mingw64-binutils python-setuptools meson mingw64-glib2-static mingw64-glib2 diffutils
+
+FROM builder as qemu-builder
+WORKDIR /src/qemu #assuming qemu source tree is already available at /src/qemu
+RUN
+RUN ./configure --cross-prefix=x86_64-w64-mingw32- --target-list='' --static
+RUN make V=1 tools
+```
+With either `make tools` or `make qemu-img.exe` I get
+
+```
+#10 0.265 changing dir to build for make "tools"...
+#10 0.267 make[1]: Entering directory '/src/qemu/build'
+#10 0.330 ninja: no work to do.
+#10 0.331 { \\
+#10 0.331   echo 'ninja-targets = \\'; \\
+#10 0.331   /usr/bin/ninja -t targets all | sed 's/:.*//; $!s/$/ \\\\/'; \\
+#10 0.331   echo 'build-files = \\'; \\
+#10 0.331   /usr/bin/ninja -t query build.ninja | sed -n '1,/^  input:/d; /^  outputs:/q; s/$/ \\\\/p'; \\
+#10 0.331 } > Makefile.ninja.tmp && mv Makefile.ninja.tmp Makefile.ninja
+#10 0.363 /src/qemu/build/pyvenv/bin/meson introspect --targets --tests --benchmarks | /src/qemu/build/pyvenv/bin/python3 -B scripts/mtest2make.py > Makefile.mtest
+#10 0.634 make[1]: Nothing to be done for 'tools'.
+#10 0.634 make[1]: Leaving directory '/src/qemu/build'
+#10 DONE 0.6s
+```
+
+Following the info in `make help`, I tried `make qemu-img.o` which resulted in
+
+```
+cc    -c -o qemu-img.o qemu-img.c
+qemu-img.c:25:10: fatal error: qemu/osdep.h: No such file or directory
+   25 | #include "qemu/osdep.h"
+      |          ^~~~~~~~~~~~~~
+```"""
+reproduce = "n/a"
+additional = """"""