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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>I’m compiling for arm with and without optimization and get different sections for the initialized static variable myvar.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>Unexpected section (wrong):<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-US>clang -std=c99 --target=thumbv7em-unknown-none-eabihf -g3 -O1 -gdwarf-2 -gstrict-dwarf -fdebug-macro -c main.c<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>llvm-objdump.exe .\main.o –t<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo4'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>shows that the static initialized variable myvar is in section .bss instead of section .data.myvar as expected:<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo4'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>00000004 l O .bss 00000001 myvar<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>Correct (expected) section without optimization (level 0):<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-US>clang -std=c99 --target=thumbv7em-unknown-none-eabihf -g3 –O0 -gdwarf-2 -gstrict-dwarf -fdebug-macro -c main.c<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>llvm-objdump.exe .\main.o –t<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo4'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>shows that the static initialized variable myvar is in section .data.myvar instead of section .data as expected:<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo4'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>00000000 l O .data_myvar 00000004 myvar<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>My example code:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Main.c<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>typedef enum<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>{<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> myinit = 0x1,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> myidle = 0x2,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> mybusy = 0x3<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>} myenumvar;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>int startcond; // -> .bss<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US># pragma clang section data=".data_myvar"<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>static myenumvar myvar = myinit;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US># pragma clang section data=""<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>int main(void)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>{<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> startcond = 1;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> if(1 == startcond)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> {<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> if(myinit == myvar)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> {<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> myvar = mybusy;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>startcond = 0;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> while(1);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> return 0;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I wonder if this is a bug or am I missing some other option flags?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Helmut<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>