rpmbuild 配置文件

%ifarch xxxx
%ifnarch xxxx
%if "%{_arch}" == "x86_64"
%if "%{_target_cpu}" == "x86_64"
%if "%{__isa_name}" == "x86"
# Since rpm 4.6.0
%if "%{?_isa}" == "(x86_64)"

# ==============================================================================
# https://github.com/tsudot/kamailio/blob/ddf83621413a04b3f4b8182fbe97f5f0be38f8f8/pkg/ser/opensuse/ser.spec#L17-L19
# 在目标架构为 x86_64 时应用 Patch 文件 Makefile.defs.patch
# ==============================================================================
%ifarch x86_64
Patch: Makefile.defs.patch
%endif
# ==============================================================================
# https://github.com/tsudot/kamailio/blob/ddf83621413a04b3f4b8182fbe97f5f0be38f8f8/pkg/ser/opensuse/ser.spec#L70-L72
# 在目标架构为 x86_64 时应用 Patch 文件
# ==============================================================================
%ifarch x86_64
%patch
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/Beibeixi/K2PBCM/blob/906e81024c9343849bcc293a3b16ef0b0cd63fe6/release/src/router/freeradius-server-3.0.0/suse/freeradius.spec#L130-L133
# 针对特定目标架构合成 C/C++ 编译参数
# ==============================================================================
export CFLAGS="$RPM_OPT_FLAGS"
%ifarch x86_64 ppc ppc64 s390 s390x
export CFLAGS="$CFLAGS -fPIC -DPIC"
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/skottler/go-rpms/blob/388f10d4f4b4cec4e93f8da3b5e0a0b496e0413f/go.spec#L18-L23
# 针对特定目标架构定义全局变量 GOARCH
# ==============================================================================
%ifarch %ix86
    %global GOARCH 386
%endif
%ifarch x86_64
    %global GOARCH amd64
%endif
# ==============================================================================
# https://github.com/glen77777/ponylang/blob/eb5efd383ddde2e7425267fe44ed51013aaa2f4b/.packaging/rpm/ponyc.spec#L4-L6
# 针对特定目标架构定义全局变量 arch_build_args
# ==============================================================================
%ifarch x86_64
%global arch_build_args arch=x86-64 tune=intel
%endif
# ==============================================================================
# https://github.com/harryyoud/refind-efi/blob/79ed85b4dee4e6d8bc4068e7b9730acdaa0ff52e/refind-alt.spec#L22-L27
# 针对特定目标架构定义宏 _efi_arch
# ==============================================================================
%ifarch x86_64
%define _efi_arch x64
%endif
%ifarch %ix86
%define _efi_arch ia32
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/Samsung/ONE/blob/56f2e5b84224adf2474d584779b234f0be006cce/packaging/nnfw.spec#L53-L57
# 针对特定目标架构切换第三方库依赖及版本
# ==============================================================================
%ifarch %{arm} aarch64
# Require python for acl-ex library build pre-process
BuildRequires:  python3
BuildRequires:  libarmcl-devel >= v21.02
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/BackupTheBerlios/kiwi/blob/71e47f2c2e9184d28777d6a72ee2852fd3b6b509/rpm/kiwi.spec#L49-L53
# 针对特定目标架构和操作系统版本调整依赖
# ==============================================================================
%ifarch %ix86 x86_64
%if %{suse_version} > 1010
Requires:       squashfs
%endif
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/OpenMandrivaAssociation/livecd-tools/blob/e6b660c4fc35234345e1386bdae8a1d02e0dcf49/livecd-tools.spec#L50-L52
# 针对特定目标架构推荐弹性依赖
# ==============================================================================
%ifarch %{ix86} %{x86_64} ppc ppc64
Recommends:    hfsplus-tools
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/git-lfs/git-lfs/blob/4226abf8dc234c6f440c25d8d2f65449adf42b2b/rpm/SPECS/git-lfs.spec#L36-L40
# 通过 RPM 工具内置宏 _arch 判断目标架构，定义不同值的全局变量 GOARCH 并执行 make 命令
# ==============================================================================
  %if "%{_arch}" == "i386"
    GOARCH=386 FORCE_LOCALIZE=true make
  %else
    GOARCH=amd64 FORCE_LOCALIZE=true make
  %endif
# ==============================================================================

# ==============================================================================
# https://github.com/meganz/MEGAsync/blob/b3be8ce21b733d9fc27b6b3da76dfbc3a41e5c85/build/templates/MEGAsync/megasync.spec#L141-L144
# 通过 RPM 工具内置宏 _target_cpu 判断目标架构，仅在 64 位架构下引入 pdfium-mega 依赖
# ==============================================================================
#Pdfium: required for 64 bits only
%if "%{_target_cpu}" != "i586" &&  "%{_target_cpu}" != "i686"
    BuildRequires: pdfium-mega
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/lambci/yumda/blob/be448d790ced7777c31003797ebd08b3ada384a9/amazon-linux-2/build/specs/amzn2/libjpeg-turbo.spec#L27-L29
# 通过 RPM 工具内置宏 `_isa` 获取目标架构，若值不为空则生成额外的带目标指令集名称后缀的软件包
# ==============================================================================
%if "%{?_isa}" != ""
Provides: libjpeg%{_isa} = 6b-47%{?dist}
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/bmwiedemann/openSUSE/blob/faed089248bae5849f085cde719a1b8ee9a9a9a5/packages/p/python38/python38.spec#L72-L77
# 通过 RPM 工具内置宏 `__isa_name` 获取目标指令集名称，若为 ppc 则特殊处理全局变量 archname 的值
# ==============================================================================
# rpm and python have different ideas about what is an arch-dependent name, so:
%if "%{__isa_name}" == "ppc"
    %define archname %(echo %{_arch} | sed s/ppc/powerpc/)
%else
    %define archname %{_arch}
%endif
# ==============================================================================

# ==============================================================================
# https://github.com/lambci/yumda/blob/482344079fd925c39fd72027f63e8ad3218c7174/amazon-linux-2/build/specs/lambda2/icu.spec#L1-L2
# 指定主包名和版本
# ==============================================================================
Name:      icu
Version:   50.2
# ==============================================================================
# https://github.com/lambci/yumda/blob/482344079fd925c39fd72027f63e8ad3218c7174/amazon-linux-2/build/specs/lambda2/icu.spec#L18
# 根据主包名、目标指令集名称和主包版本引入对应依赖 (libicu)
# ==============================================================================
Requires: lib%{name}%{?_isa} >= %{version}
# ==============================================================================

# ==============================================================================
# https://github.com/jav/systemtap/blob/d6d8634e46c520ecdf5675f0590963497c206d4f/systemtap.spec#L219-L221
# 通过 __isa_name 宏引入对应指令集下的 glibc-devel 32 位版本依赖
# ==============================================================================
%if %{_arch} == x86_64
Requires: glibc-devel(%{__isa_name}-32)
%endif
# ==============================================================================