From 9898edeb30d3bcdba7a645f3689d22791f4b794a Mon Sep 17 00:00:00 2001 From: Paul Schneider Date: Mon, 17 Aug 2026 18:29:39 +0100 Subject: [PATCH] Makefile: dpkg-architecture -c to set env and exec in one shot MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit dpkg-architecture -aarm64 sets DEB_HOST_ARCH=arm64 but does not propagate the env to the calling shell. The 'eval $(dpkg-architecture $DPKG_ARCH_ARGS)' pattern tried to bridge that but failed: the command substitution was parsed by make before bash ever ran, with $DPKG_ARCH_ARGS still empty at make parse time. dpkg-architecture's -c flag runs a command with the proper env set up: 'dpkg-architecture -aarm64 -c "..."' exports all the DEB_* vars and then execs the command, all in one process. The 'CC system type mismatch' warning on stderr is informational (it complains that the C compiler isn't cross, but we don't compile C — we only cross-publish .NET binaries). Verified locally: 'dpkg-architecture -aarm64 -c "echo \$DEB_HOST_ARCH"' prints 'arm64'. --- Makefile | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index db104b0..43db2b6 100644 --- a/Makefile +++ b/Makefile @@ -54,7 +54,12 @@ deb: # vars set by dpkg-architecture are visible to dpkg-buildpackage. # make runs each recipe line in its own shell, so we use # backslash continuation to glue everything together. - DPKG_ARCH_ARGS=$$(case "$(POSTIT_RUNTIME)" in linux-arm64) echo "-aarm64" ;; linux-x64) echo "-aamd64" ;; *) echo "unsupported POSTIT_RUNTIME=$(POSTIT_RUNTIME)" >&2; exit 1 ;; esac); eval $$(dpkg-architecture $$DPKG_ARCH_ARGS); POSTIT_GIT_URL=$(POSTIT_GIT_URL) POSTIT_GIT_TAG=$(POSTIT_GIT_TAG) POSTIT_RUNTIME=$(POSTIT_RUNTIME) dpkg-buildpackage -us -uc -b + # dpkg-architecture -c sets up DEB_* vars and runs + # in the same shell, so the env is visible to dpkg-buildpackage. + # Use -a (host arch) for cross-builds — it tells dpkg-architecture + # to export DEB_HOST_ARCH=arm64 (and friends) even though we're + # running on amd64. -c avoids the need for a separate eval. + DPKG_ARCH_ARGS=$$(case "$(POSTIT_RUNTIME)" in linux-arm64) echo "-aarm64" ;; linux-x64) echo "-aamd64" ;; *) echo "unsupported POSTIT_RUNTIME=$(POSTIT_RUNTIME)" >&2; exit 1 ;; esac); dpkg-architecture $$DPKG_ARCH_ARGS -c "POSTIT_GIT_URL=$(POSTIT_GIT_URL) POSTIT_GIT_TAG=$(POSTIT_GIT_TAG) POSTIT_RUNTIME=$(POSTIT_RUNTIME) dpkg-buildpackage -us -uc -b" # dpkg-buildpackage already writes the produced .deb to # /src/_src/../ = $POSTIT_OUT_DIR (its default — there's no # flag to change it). So no 'mv' is needed. The old 'mv'