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Auto-detect Android NDK and javac paths in Makefile.android

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Remove hardcoded /home/vladimir and /opt paths. NDK is now resolved via
ANDROID_NDK_HOME, ANDROID_SDK_ROOT/ANDROID_HOME, or the default SDK
location for Linux/macOS (latest version picked automatically). javac is
resolved via JAVA_HOME, system PATH, or Android Studio JBR on Linux/macOS.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Uladzimir Karpenka 2026-06-12 21:31:15 +03:00
parent 4f44118299
commit 4313006fa6
1 changed files with 26 additions and 3 deletions
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29
Makefile.android
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@ -8,13 +8,36 @@
# FFTW source is downloaded and extracted automatically.
# Override FFTW_SRC to use an existing directory.
ANDROID_NDK ?= /home/vladimir/Android/Sdk/ndk/29.0.14206865
# Auto-detect NDK path (can always be overridden by setting ANDROID_NDK explicitly):
# 1. ANDROID_NDK_HOME environment variable
# 2. Latest NDK under ANDROID_SDK_ROOT or ANDROID_HOME
# 3. Default SDK locations: ~/Android/Sdk (Linux) or ~/Library/Android/sdk (macOS)
ifeq ($(origin ANDROID_NDK),undefined)
ifdef ANDROID_NDK_HOME
ANDROID_NDK := $(ANDROID_NDK_HOME)
else
_SDK_ROOT := $(or $(ANDROID_SDK_ROOT),$(ANDROID_HOME),\
$(wildcard $(HOME)/Android/Sdk),\
$(wildcard $(HOME)/Library/Android/sdk))
ifdef _SDK_ROOT
ANDROID_NDK := $(lastword $(sort $(wildcard $(_SDK_ROOT)/ndk/*)))
endif
endif
endif
ifndef ANDROID_NDK
$(error Cannot find Android NDK. Set ANDROID_NDK, ANDROID_NDK_HOME, ANDROID_SDK_ROOT, or ANDROID_HOME)
endif
ANDROID_API ?= 24
ANDROID_ABIS ?= arm64-v8a armeabi-v7a x86_64
ANDROID_HOST_TAG ?= $(shell uname -s | tr '[:upper:]' '[:lower:]' | sed 's/darwin/darwin/;s/linux/linux/')-$(shell uname -m | sed 's/aarch64/arm64/;s/x86_64/x86_64/')
JBR_BIN ?= /opt/android-studio/jbr/bin
JAVAC ?= $(JBR_BIN)/javac
# Auto-detect javac: JAVA_HOME > system PATH > Android Studio JBR (Linux/macOS)
_JAVAC_CANDIDATES := \
$(if $(JAVA_HOME),$(wildcard $(JAVA_HOME)/bin/javac)) \
$(shell command -v javac 2>/dev/null) \
$(wildcard /opt/android-studio/jbr/bin/javac) \
$(wildcard /Applications/Android\ Studio.app/Contents/jbr/Contents/Home/bin/javac)
JAVAC ?= $(firstword $(_JAVAC_CANDIDATES))
TOOLCHAIN := $(ANDROID_NDK)/toolchains/llvm/prebuilt/$(ANDROID_HOST_TAG)