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Makefile: Report error and stop if we can't set TARGET

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I don't think it's necessarily productive to check all the possible
error conditions in the Makefile, but this one is annoying: issue
'make' without a C compiler, then install one, and build again.

Then run passt and it will mysteriously terminate on epoll_wait(),
because seccomp.h is good enough to build against, but the resulting
seccomp filter doesn't allow any system call. Not really fun to debug.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio 2024-12-19 17:27:44 +01:00
parent e5ba8adef7
commit 2385b69a66
1 changed files with 1 additions and 0 deletions
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Makefile
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@ -16,6 +16,7 @@ VERSION ?= $(shell git describe --tags HEAD 2>/dev/null || echo "unknown\ versio
DUAL_STACK_SOCKETS := 1
TARGET ?= $(shell $(CC) -dumpmachine)
$(if $(TARGET),,$(error Failed to get target architecture))
# Get 'uname -m'-like architecture description for target
TARGET_ARCH := $(firstword $(subst -, ,$(TARGET)))
TARGET_ARCH := $(patsubst [:upper:],[:lower:],$(TARGET_ARCH))