[Buildroot] [PATCH v2] package/swipl: fix build without C++ compiler

From: Peter Korsgaard <peter@korsgaard.com>
To: buildroot@buildroot.org
Cc: Julien Olivain <ju.o@free.fr>
Subject: [Buildroot] [PATCH v2] package/swipl: fix build without C++ compiler
Date: Wed,  5 Feb 2025 13:00:58 +0100	[thread overview]
Message-ID: <20250205120058.36299-1-peter@korsgaard.com> (raw)

Fixes http://autobuild.buildroot.net/results/b24a96b999676990995a466686fe1eacf6cddfef

Some of the optional packages in swipl are written in C++, so CMake thinks a
C++ compiler is needed even though we build with -DSWIPL_PACKAGES=OFF since
the bump to 9.2.6 in commit 33d45b9c672df0 ("package/swipl: bump version to
9.2.6").

Add -DCMAKE_CXX_COMPILER=true to satisfy this check even in setups without
C++:

-- Check for working CXX compiler: /usr/bin/true
-- Check for working CXX compiler: /usr/bin/true - works

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
Changes since v1:
- Add info about since when the issue occurs.

 package/swipl/swipl.mk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/package/swipl/swipl.mk b/package/swipl/swipl.mk
index ef9aedcd2d..e29b8d8f46 100644
--- a/package/swipl/swipl.mk
+++ b/package/swipl/swipl.mk
@@ -36,7 +36,8 @@ SWIPL_CONF_OPTS = \
 	-DQSORT_R_GNU=1 \
 	-DSWIPL_NATIVE_FRIEND=$(HOST_SWIPL_SRCDIR) \
 	-DSWIPL_PACKAGES=OFF \
-	-DUSE_TCMALLOC=OFF
+	-DUSE_TCMALLOC=OFF \
+	-DCMAKE_CXX_COMPILER=true
 
 ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
 SWIPL_CONF_OPTS += -DCMAKE_EXE_LINKER_FLAGS=-latomic
-- 
2.39.5

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