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build: do not pass empty CMAKE_INSTALL_PREFIX

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ref #9748
ref #9743
This commit is contained in:
Justin M. Keyes 2019-03-19 02:49:33 +01:00
parent 5beb3b8ee5
commit ad3b312cf5
1 changed files with 4 additions and 1 deletions
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5
Makefile
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@ -7,6 +7,7 @@ filter-true = $(strip $(filter-out 1 on ON true TRUE,$1))
CMAKE_PRG ?= $(shell (command -v cmake3 || echo cmake))
CMAKE_BUILD_TYPE ?= Debug
CMAKE_FLAGS := -DCMAKE_BUILD_TYPE=$(CMAKE_BUILD_TYPE)
# Extra CMake flags which extend the default set
CMAKE_EXTRA_FLAGS ?=
@ -15,7 +16,9 @@ CMAKE_EXTRA_FLAGS ?=
# - `checkprefix` target checks that it matches the CMake-cached value. #9615
CMAKE_INSTALL_PREFIX ?= $(shell echo $(CMAKE_EXTRA_FLAGS) | 2>/dev/null \
grep -o 'CMAKE_INSTALL_PREFIX=[^ ]\+' | cut -d '=' -f2)
CMAKE_FLAGS := -DCMAKE_BUILD_TYPE=$(CMAKE_BUILD_TYPE) -DCMAKE_INSTALL_PREFIX=$(CMAKE_INSTALL_PREFIX)
ifneq (,$(CMAKE_INSTALL_PREFIX))
CMAKE_FLAGS += -DCMAKE_INSTALL_PREFIX=$(CMAKE_INSTALL_PREFIX)
endif
BUILD_TYPE ?= $(shell (type ninja > /dev/null 2>&1 && echo "Ninja") || \
echo "Unix Makefiles")