Date: Sun, 19 Nov 2017 23:56:17 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-toolchain@FreeBSD.org Subject: [Bug 223752] clang __attribute__((constructor)) gets wrong input parameters Message-ID: <bug-223752-29464-1a6l35ws3D@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-223752-29464@https.bugs.freebsd.org/bugzilla/> References: <bug-223752-29464@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223752 --- Comment #7 from dstaesse <dimitri.staessens@ugent.be> --- (In reply to Mark Millard from comment #5) Good point, we only tried amd64 and i386. This feature seems to be very sparsely documented, with some sources saying everything but void func(void) is undefined behaviour and others stating that it can have the same signature as the main() function. The GNU compiler documentation doesn't give details and clang doesn't document it at all. I've seen other projects use this, though. The compiler doesn't seem to check the function signature at all, I've tried to set the constructor attribute to functions with all sorts of parameters and complaints. If this is undefined behaviour, do you know of a portable way to access argv from a shared library without passing it as a function parameter to some init call? -- You are receiving this mail because: You are the assignee for the bug.
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