[PR PATCH] build-style/cmake: pass LIBS as CMAKE_*_STANDARD_LIBRARIES

[sgn <sgn@users.noreply.github.com>]

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There is a new pull request by sgn against master on the void-packages repository

https://github.com/sgn/void-packages build-style-cmake-pass-libs
https://github.com/void-linux/void-packages/pull/29028

build-style/cmake: pass LIBS as CMAKE_*_STANDARD_LIBRARIES
Normally, we can add them into configure_args directly.
However, if we need to link with 2 or more libaries (e.g. -latomic
and -lexecinfo on armv6-musl), we have noway to do it properly:
- configure_args will be splited on whitespace
- cmake denies to recognise CMAKE_*_STANDARD_LIBRARIES as a list,
  hence denies to split on semicolon (";")

Let's pass LIBS as CMAKE_*_STANDARD_LIBRARIES instead.

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- [ ] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

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A patch file from https://github.com/void-linux/void-packages/pull/29028.patch is attached

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From 0cf2317fc887e1aa3ec8384aae68941747a7d10f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C4=90o=C3=A0n=20Tr=E1=BA=A7n=20C=C3=B4ng=20Danh?=
 <congdanhqx@gmail.com>
Date: Wed, 24 Feb 2021 20:17:26 +0700
Subject: [PATCH] build-style/cmake: pass LIBS as CMAKE_*_STANDARD_LIBRARIES

Normally, we can add them into configure_args directly.
However, if we need to link with 2 or more libaries (e.g. -latomic
and -lexecinfo on armv6-musl), we have noway to do it properly:
- configure_args will be splited on whitespace
- cmake denies to recognise CMAKE_*_STANDARD_LIBRARIES as a list,
  hence denies to split on semicolon (";")

Let's pass LIBS as CMAKE_*_STANDARD_LIBRARIES instead.
---
 common/build-style/cmake.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/common/build-style/cmake.sh b/common/build-style/cmake.sh
index 5100a96dfd7..8bd5f8e0a7b 100644
--- a/common/build-style/cmake.sh
+++ b/common/build-style/cmake.sh
@@ -65,7 +65,10 @@ _EOF
 	export CMAKE_GENERATOR="${CMAKE_GENERATOR:-Ninja}"
 	# Override flags: https://gitlab.kitware.com/cmake/cmake/issues/19590
 	CFLAGS="${CFLAGS/ -pipe / }" CXXFLAGS="${CXXFLAGS/ -pipe / }" \
-		cmake ${cmake_args} ${configure_args} ${wrksrc}/${build_wrksrc}
+		cmake ${cmake_args} ${configure_args} \
+		${LIBS:+-DCMAKE_C_STANDARD_LIBRARIES="$LIBS"} \
+		${LIBS:+-DCMAKE_CXX_STANDARD_LIBRARIES="$LIBS"} \
+		${wrksrc}/${build_wrksrc}
 
 	# Replace -isystem with -I
 	if [ "$CMAKE_GENERATOR" = "Unix Makefiles" ]; then