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[Fix] (CMake): the Android API guard holds a floor of 26, not an exact pin - higher platforms may configure, the minSdk-26 gradle build enforces API usage

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swung0x48
2026-08-11 22:08:54 -04:00
parent 2292e99476
commit 99ebf67a3d
1 changed files with 17 additions and 13 deletions
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CMakeLists.txt
+17 -13
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@@ -21,10 +21,13 @@ if (ANDROID)
set(MOBILEGL_BUILD_TEST OFF CACHE BOOL "Build MobileGL tests" FORCE)
set(MOBILEGL_BUILD_BENCHMARK OFF CACHE BOOL "Build MobileGL benchmarks" FORCE)
# ------- Android API level policy: exactly 26, decided here and only here -------
# MobileGL ships against API 26. That is a product constraint, so the build
# refuses to proceed at any other level rather than quietly producing a
# library with a different libc contract.
# ------- Android API level policy: minimum 26, decided here and only here -------
# MobileGL ships against API 26: the codebase must not use any API introduced
# after 26. That usage constraint is enforced where it is real - the shipping
# gradle build compiles at minSdk 26, where a newer API is simply undeclared
# and fails to compile. Configuring at a HIGHER level is therefore allowed
# (nothing in the tree may rely on it), but a LOWER level would change the
# libc contract underneath the shipped library and is refused.
#
# This has to live at configure time because the level cannot be corrected
# from a source header. A `#define __ANDROID_API__ 26` in a common header
@@ -71,19 +74,20 @@ if (ANDROID)
"MobileGL: could not determine the Android API level (got "
"\"${_mobilegl_android_api}\"). Configure with the NDK toolchain "
"file and -DANDROID_PLATFORM=android-${MOBILEGL_ANDROID_API_LEVEL}.")
elseif (NOT _mobilegl_android_api EQUAL MOBILEGL_ANDROID_API_LEVEL)
elseif (_mobilegl_android_api LESS MOBILEGL_ANDROID_API_LEVEL)
message(FATAL_ERROR
"MobileGL targets Android API ${MOBILEGL_ANDROID_API_LEVEL} exactly, "
"MobileGL requires at least Android API ${MOBILEGL_ANDROID_API_LEVEL}, "
"but this build resolved to API ${_mobilegl_android_api}.\n"
"Configure with -DANDROID_PLATFORM=android-${MOBILEGL_ANDROID_API_LEVEL} "
"(gradle builds get this from minSdk ${MOBILEGL_ANDROID_API_LEVEL}, so "
"check that minSdk instead of adding an override).\n"
"Raising the level is not a local build choice: it changes which libc "
"symbols the shipped library binds to, and the resulting .so would "
"fail to load on the API ${MOBILEGL_ANDROID_API_LEVEL} devices "
"MobileGL supports. If you genuinely need another level for a "
"standalone tool, build that tool as its own CMake project - do not "
"relax this check.")
"check that minSdk instead of adding an override).")
elseif (_mobilegl_android_api GREATER MOBILEGL_ANDROID_API_LEVEL)
message(STATUS
"MobileGL: configuring at Android API ${_mobilegl_android_api} "
"(> shipping minimum ${MOBILEGL_ANDROID_API_LEVEL}). Allowed, but the "
"tree must not use post-${MOBILEGL_ANDROID_API_LEVEL} APIs - the "
"minSdk-${MOBILEGL_ANDROID_API_LEVEL} gradle build is the enforcing "
"compile.")
endif()
message(STATUS "MobileGL: Android API level ${_mobilegl_android_api}")