Fixes for GCC 9 and clang 10 #57
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The existing script fails to detect compiler versions properly if the
major version has more than one digit. For example, with clang version
10, the script incorrectly interprets the version number as "1". Fix
the script to parse the digits until the first dot as the major version
instead, thus preserving the correct major version number.
(head -n1 is added in case the version number is mentioned more than once
by ${CXX} --version.)
Also, print the version number and the compiler when building to make
sure the correct compiler and version number were detected.
"ptr" may already exist in the base class. A simple fix is to rename the ptr instances in unique.hpp to "ptr_". Otherwise, clang reports errors.
When building with GCC 9, this comparison causes this error:
comparison of integer expressions of different signedness: ‘jni::jsize’ {aka ‘long unsigned int’} and ‘int’
As a workaround, explicitely cast the return value of max()
to jsize (not ::jsize !).
GCC 9 complains about these reinterpret_cast expressions because of the
different return value:
error: cast between incompatible function types from ‘void (*)(JNIEnv*, jni::jobject*, jni::jobject*)’ {aka ‘void (*)(_JNIEnv*, jni::jobject*, jni::jobject*)’} to ‘jboolean (*)(JNIEnv*, jobject, jobject)’ {aka ‘unsigned char (*)(_JNIEnv*, _jobject*, _jobject*)’}
Fix by using void as return value.
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Could someone please merge this PR after reviewing? It seems fairly simple to me, and compiling with the default compilers on major distros is really helpful to newcomers... Thanks in advance, |
G10h4ck
approved these changes
Nov 22, 2021
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ping @jfirebaugh |
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Currently, jni.hpp does not build in Ubuntu 20.04 with GCC 9 and clang 10. These commits fix the issues.