为NSIS安装程序选择32位还是64位？

Question

I have found some similar questions but I'm not totally sure that they answer my question. I am needing to include Java within my installer, however, we will not know whether the client is using 32 or 64 bit and we do not want to make the assumption. We have considered just using the 32 bit JRE since it will also work on 64 bit systems and it will also not require packaging more than one JRE. We also will not know if the client has internet connectivity to have it connect and choose for the client. Is there an easy way to decide between these two in NSIS? Should I just use the 32 bit JRE and not worry about it?

Answer 1

NSIS has a header file with some helper macros for 64-bit stuff:

!include x64.nsh
!include LogicLib.nsh

Section
!if "${NSIS_PTR_SIZE}" >= 8
  DetailPrint "64-bit installer"
!else
  ${If} ${RunningX64}
    DetailPrint "32-bit installer on a 64-bit OS"
  ${Else}
    DetailPrint "32-bit installer on a 32-bit OS"
  ${EndIf}
!endif
SectionEnd