Tilera cross compilation - Any idea about this Error: unknown asm constraint letter

Question

arun_l 0 Newbie Poster

14 Years Ago

We are getting these constraint errors wherver OSAF calls like m_NCS_SEL_OBJ_ZERO(&nSelObjSet) is called in our code. This is while cross compiling using tilera compiler - tile-g++. With g++ it always compiles fine. Any pointers would be helpful.

Sample Code:
102 // initialise and set selection object set
103 m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
104 m_NCS_SEL_OBJ_SET(nMdsSelObj, &nSelObjSet);
---------------------
Error:
/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx:
"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'c'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^

"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'D'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^

"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'a'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^

"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 110: error:
unknown asm constraint letter 'q'
if (m_NCS_SEL_OBJ_ISSET(nMdsSelObj, &nSelObjSet))
^

4 errors detected in the compilation of "/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx".
/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/EnbCfgMgr.cxx:

Arun L.

c++

Edited 14 Years Ago by arun_l because: n/a

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Latest Post 14 Years Ago Latest Post by arun_l

Ancient Dragon 5,243 Achieved Level 70

14 Years Ago

Does that compiler have a limit on the length of a symbol? I recall very very old C compilers had a limit of 6 characters for symbol names (this was in the days before c++).

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arun_l 0 Newbie Poster · Answer 1 · 2010-10-27T18:23:43+00:00

Does that compiler have a limit on the length of a symbol? I recall very very old C compilers had a limit of 6 characters for symbol names (this was in the days before c++).

No, It can accept upto 32 letters.

m_NCS_SEL_OBJ_ZERO is a macro and it will be replaced by FD_ZERO

arun_l 0 Newbie Poster · Answer 2 · 2010-10-28T12:26:08+00:00

We are getting these constraint errors wherver OSAF calls like m_NCS_SEL_OBJ_ZERO(&nSelObjSet) is called in our code. This is while cross compiling using tilera compiler - tile-g++. With g++ it always compiles fine. Any pointers would be helpful.

Sample Code:
102 // initialise and set selection object set
103 m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
104 m_NCS_SEL_OBJ_SET(nMdsSelObj, &nSelObjSet);
---------------------
Error:
/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx:
"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'c'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^
"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'D'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^
"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 103: error:
unknown asm constraint letter 'a'
m_NCS_SEL_OBJ_ZERO(&nSelObjSet);
^
"/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx", line 110: error:
unknown asm constraint letter 'q'
if (m_NCS_SEL_OBJ_ISSET(nMdsSelObj, &nSelObjSet))
^
4 errors detected in the compilation of "/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/ConfigManagerThread.cxx".
/u/TILERA/STACK/DEV/lte/lte_enb/enb_cfgmgr/src/EnbCfgMgr.cxx:

Arun L.

cross compiler was picking up host headers for FD_ZERO so, now it is corrected to pick up target header file and compilation is going through..