package/pkg-meson: use buildroot-build for build directory

Fixes https://gitlab.com/buildroot.org/buildroot/-/issues/64

Some source tarballs (E.G.  libopenh264) may already contain a build/
subdir, so switch to the more unique bildroot-build for the build directory,
similar to how it is done for cmake.

Signed-off-by: Cherniaev Andrei <dungeonlords789@naver.com>
Co-Authored-By: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Peter: reword commit text]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pkg-meson.mk

@@ -147,12 +147,12 @@ $(2)_CXXFLAGS ?= $$(TARGET_CXXFLAGS)
 #
 #
 define $(2)_CONFIGURE_CMDS
-	rm -rf $$($$(PKG)_SRCDIR)/build
-	mkdir -p $$($$(PKG)_SRCDIR)/build
+	rm -rf $$($$(PKG)_SRCDIR)/buildroot-build
+	mkdir -p $$($$(PKG)_SRCDIR)/buildroot-build
 	sed -e "/^\[binaries\]$$$$/s:$$$$:$$(foreach x,$$($(2)_MESON_EXTRA_BINARIES),\n$$(x)):" \
 	    -e "/^\[properties\]$$$$/s:$$$$:$$(foreach x,$$($(2)_MESON_EXTRA_PROPERTIES),\n$$(x)):" \
 	    $$(call PKG_MESON_CROSSCONFIG_SED,$(2)_CFLAGS,$(2)_CXXFLAGS,$(2)_LDFLAGS,$(2)_FCFLAGS) \
-	    > $$($$(PKG)_SRCDIR)/build/cross-compilation.conf
+	    > $$($$(PKG)_SRCDIR)/buildroot-build/cross-compilation.conf
 	PATH=$$(BR_PATH) \
 	CC_FOR_BUILD="$$(HOSTCC)" \
 	CXX_FOR_BUILD="$$(HOSTCXX)" \
@@ -162,21 +162,21 @@ define $(2)_CONFIGURE_CMDS
 		--libdir=lib \
 		--default-library=$(PKG_MESON_DEFAULT_LIBRARY) \
 		--buildtype=$(if $(BR2_ENABLE_RUNTIME_DEBUG),debug,release) \
-		--cross-file=$$($$(PKG)_SRCDIR)/build/cross-compilation.conf \
+		--cross-file=$$($$(PKG)_SRCDIR)/buildroot-build/cross-compilation.conf \
 		-Db_pie=false \
 		-Db_staticpic=$(if $(BR2_m68k_cf),false,true) \
 		-Dstrip=false \
 		-Dbuild.pkg_config_path=$$(HOST_DIR)/lib/pkgconfig \
 		-Dbuild.cmake_prefix_path=$$(HOST_DIR)/lib/cmake \
 		$$($$(PKG)_CONF_OPTS) \
-		$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/build
+		$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/buildroot-build
 endef
 else
 
 # Configure package for host
 define $(2)_CONFIGURE_CMDS
-	rm -rf $$($$(PKG)_SRCDIR)/build
-	mkdir -p $$($$(PKG)_SRCDIR)/build
+	rm -rf $$($$(PKG)_SRCDIR)/buildroot-build
+	mkdir -p $$($$(PKG)_SRCDIR)/buildroot-build
 	$$(HOST_CONFIGURE_OPTS) \
 	$$($$(PKG)_CONF_ENV) $$(MESON) setup \
 		--prefix=$$(HOST_DIR) \
@@ -188,7 +188,7 @@ define $(2)_CONFIGURE_CMDS
 		--wrap-mode=nodownload \
 		-Dstrip=true \
 		$$($$(PKG)_CONF_OPTS) \
-		$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/build
+		$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/buildroot-build
 endef
 endif
 endif
@@ -203,12 +203,12 @@ ifndef $(2)_BUILD_CMDS
 ifeq ($(4),target)
 define $(2)_BUILD_CMDS
 	$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
-		$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build
+		$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/buildroot-build
 endef
 else
 define $(2)_BUILD_CMDS
 	$$(HOST_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
-		$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build
+		$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/buildroot-build
 endef
 endif
 endif
@@ -220,7 +220,7 @@ endif
 ifndef $(2)_INSTALL_CMDS
 define $(2)_INSTALL_CMDS
 	$$(HOST_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
-		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
+		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/buildroot-build install
 endef
 endif
 
@@ -231,7 +231,7 @@ endif
 ifndef $(2)_INSTALL_STAGING_CMDS
 define $(2)_INSTALL_STAGING_CMDS
 	$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) DESTDIR=$$(STAGING_DIR) \
-		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
+		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/buildroot-build install
 endef
 endif
 
@@ -242,7 +242,7 @@ endif
 ifndef $(2)_INSTALL_TARGET_CMDS
 define $(2)_INSTALL_TARGET_CMDS
 	$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) DESTDIR=$$(TARGET_DIR) \
-		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
+		$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/buildroot-build install
 endef
 endif